The mininterval program

This command is obsolete; it is no longer included in the current version.
mininterval program [arg ...]

mininterval stat()s the file named in $MININTERVAL_FILE; if the file exists (typically, it would be a file which is touched each time the scheduled job runs), then mininterval increases $DELAY as necessary to ensure that the current time plus $DELAY seconds is no sooner than the file's modification time plus $MININTERVAL seconds. If $DELAY is not set, this is interpreted as an indefinite delay, and mininterval leaves it unset. Finally, mininterval runs the given command.