The monitoring Linux guide states that
a subdirectory in plugins whose name is a numeric: representing a count of seconds
WATO - Configuration > Monitoring Agents > Agent files > Linux/Unix Agents - Plugins > README you can read:
If you want a plugin to be run asynchronously and also in a larger interval then the normal check interval, then you can copy it to a subdirectory named after a number of *minutes*, e.g.: /usr/lib/check_mk_agent/plugins/60/mk_zypper In that case the agent will: - Run this plugin in the background and wait not for it to finish. - Store the result of the plugin in a cache file below /etc/check_mk/cache. - Use that file for one hour before running the script again.
Which is undoubtedly wrong. Please correct.