<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by DFIN XBRL Schema Document - http://www.dfinsolutions.com/ - on 07-10-2026 12:34:34 PM -->
<!-- Copyright(c) 2026 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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            <!--PresentationLink Dynamic End-->
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				<link:label xlink:type="resource" xlink:label="label_SP500IndexMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xml:lang="en-US">S&amp;P 500&amp;#174; Index (reflects no deduction for fees, expenses, or taxes)</link:label>
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				<link:loc xlink:type="locator" xlink:href="#nf_SECURITIESLENDINGRISKMember" xlink:label="SECURITIESLENDINGRISKMember"/>
				<link:label xlink:type="resource" xlink:label="label_SECURITIESLENDINGRISKMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">SECURITIES LENDING RISK [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SECURITIESLENDINGRISKMember" xlink:to="label_SECURITIESLENDINGRISKMember"/>
				<link:loc xlink:type="locator" xlink:href="#nf_AUTHORIZEDPARTICIPANTCONCENTRATIONRISKMember" xlink:label="AUTHORIZEDPARTICIPANTCONCENTRATIONRISKMember"/>
				<link:label xlink:type="resource" xlink:label="label_AUTHORIZEDPARTICIPANTCONCENTRATIONRISKMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">AUTHORIZED PARTICIPANT CONCENTRATION RISK [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AUTHORIZEDPARTICIPANTCONCENTRATIONRISKMember" xlink:to="label_AUTHORIZEDPARTICIPANTCONCENTRATIONRISKMember"/>
				<link:loc xlink:type="locator" xlink:href="#nf_MARKETTRADINGRISKMember" xlink:label="MARKETTRADINGRISKMember"/>
				<link:label xlink:type="resource" xlink:label="label_MARKETTRADINGRISKMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">MARKET TRADING RISK [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="MARKETTRADINGRISKMember" xlink:to="label_MARKETTRADINGRISKMember"/>
				<link:loc xlink:type="locator" xlink:href="#nf_DERIVATIVESRISKSMember" xlink:label="DERIVATIVESRISKSMember"/>
				<link:label xlink:type="resource" xlink:label="label_DERIVATIVESRISKSMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">DERIVATIVES RISKS [Member]</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DERIVATIVESRISKSMember" xlink:to="label_DERIVATIVESRISKSMember"/>

            </link:labelLink>
         </link:linkbase>
      </xs:appinfo>
  </xs:annotation>
	<xs:element name="S000109731Member" id="nf_S000109731Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SP500IndexMember" id="nf_SP500IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="C000280856Member" id="nf_C000280856Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MANAGEMENTRISKMember" id="nf_MANAGEMENTRISKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="EQUITYSECURITIESRISKMember" id="nf_EQUITYSECURITIESRISKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MARKETRISKSMember" id="nf_MARKETRISKSMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="QUALITYFACTORRISKMember" id="nf_QUALITYFACTORRISKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SECTORRISKMember" id="nf_SECTORRISKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="PREFERREDSECURITIESRISKMember" id="nf_PREFERREDSECURITIESRISKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DIVIDENDRISKMember" id="nf_DIVIDENDRISKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="SECURITIESLENDINGRISKMember" id="nf_SECURITIESLENDINGRISKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="AUTHORIZEDPARTICIPANTCONCENTRATIONRISKMember" id="nf_AUTHORIZEDPARTICIPANTCONCENTRATIONRISKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="MARKETTRADINGRISKMember" id="nf_MARKETTRADINGRISKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<xs:element name="DERIVATIVESRISKSMember" id="nf_DERIVATIVESRISKSMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>

</xs:schema>
