I noticed "nmetods" is misspelled like that in the jfr stats and also in the ./src/hotspot/share/jfr/periodic/jfrPeriodic.cpp and in ./src/hotspot/share/jfr/metadata/metadata.xml, for example jdk.CompilerStatistics {
 startTime = 21:15:29.797
 compileCount = 3460
 bailoutCount = 5
 invalidatedCount = 0
 osrCompileCount = 50
 standardCompileCount = 3410
 osrBytesCompiled = 0 bytes
 standardBytesCompiled = 0 bytes
 nmetodsSize = 6.9 MB
 nmetodCodeSize = 4.8 MB
 peakTimeSpent = 226.000 ms
 totalTimeSpent = 8.366 s
}

 805 <Event name="CompilerStatistics" category="Java Virtual Machine, Compiler" label="Compiler Statistics" thread="false" period="everyChunk" startTime="false">
 806 <Field type="int" name="compileCount" label="Compiled Methods" />
 807 <Field type="int" name="bailoutCount" label="Bailouts" />
 808 <Field type="int" name="invalidatedCount" label="Invalidated Compilations" />
 809 <Field type="int" name="osrCompileCount" label="OSR Compilations" />
 810 <Field type="int" name="standardCompileCount" label="Standard Compilations" />
 811 <Field type="ulong" contentType="bytes" name="osrBytesCompiled" label="OSR Bytes Compiled" />
 812 <Field type="ulong" contentType="bytes" name="standardBytesCompiled" label="Standard Bytes Compiled" />
 813 <Field type="ulong" contentType="bytes" name="nmetodsSize" label="Compilation Resulting Size" />
 814 <Field type="ulong" contentType="bytes" name="nmetodCodeSize" label="Compilation Resulting Code Size" />
 815 <Field type="long" contentType="millis" name="peakTimeSpent" label="Peak Time" />
 816 <Field type="long" contentType="millis" name="totalTimeSpent" label="Total time" />
 817 </Event>