/etc/periodic/weekly/320.whatis
run makewhatis.local every week
Start makewhatis for local file systems
/usr/libexec/makewhatis.local [options] directories ...
The makewhatis.local utility starts makewhatis(1) only for file systems physically mounted on the system where makewhatis.local is being executed. Running makewhatis by periodic weekly for rw nfs-mounted /usr may kill your NFS server -- all NFS clients start makewhatis at the same time! So use this wrapper for cron(8) instead of calling makewhatis directly.
/etc/periodic/weekly/320.whatis
run makewhatis.local every week
86 releases since FreeBSD 2.1.5-RELEASE; the text changed 42 times.