<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Mon Aug 31 21:23:17 UTC 2026 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/cef/2026/cef-2026.xsd#RiskOnly" roleURI="http://xbrl.sec.gov/cef/role/RiskOnly"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all"/>
  <definitionLink xlink:role="http://xbrl.sec.gov/cef/role/RiskOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="cef_AllRisksMember" xlink:href="https://xbrl.sec.gov/cef/2026/cef-2026.xsd#cef_AllRisksMember"/>
    <loc xlink:type="locator" xlink:label="frof_CLORiskMember" xlink:href="frof-20260630.xsd#frof_CLORiskMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="frof_CLORiskMember" order="3" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="frof_LiquidityRiskMember" xlink:href="frof-20260630.xsd#frof_LiquidityRiskMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="frof_LiquidityRiskMember" order="5" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="frof_GlobalMarketsRiskMember" xlink:href="frof-20260630.xsd#frof_GlobalMarketsRiskMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="frof_GlobalMarketsRiskMember" order="7" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CreditRiskMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditRiskMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="us-gaap_CreditRiskMember" order="9" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="frof_ValuationRiskMember" xlink:href="frof-20260630.xsd#frof_ValuationRiskMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="frof_ValuationRiskMember" order="11" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="frof_InterestRateRisksMember" xlink:href="frof-20260630.xsd#frof_InterestRateRisksMember"/>
<!-- [WMV7][bxVV3F+rKiWZGyOZjHSKsNIQzWKCCa8rAboB9W/iGoS1Km/pOSHMBGF9GojrM++WJdEucVTmW2wj5V7TUpnXG6yvNcgm/seSudgrEttmAZK+Wgj+U5axNLdzOuVZFqsNqdT6TyqTmv3+4sFUN8aeQF/91clhxX8BlRe8vo/dlAjVinBIeAaMXyIBGQED6hV8vQEFmwvXJlIiGMFUQlgAGmsckfpHlwIMtQU/R7DfCRX8L8v9yHeCGqVUqhVbRqEaBEvklUxtzHIvn+F7mRawRMTnur629BuawGI86SKK1styv/u5oEv6E1DBQgAxutUux9lA51428Jlvqs6TT4PcGlxgg70eE3O4yKM35C2FVQaQohHKaHiQboEL] CSR-->
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="frof_InterestRateRisksMember" order="13" xbrldt:closed="true"/>
  </definitionLink>
</linkbase>
