Typically, clock time, and traditionally used for machines that run continuously.
For machines that get powered down, anacron is often used.
You can get an idea of how they work and differ with a search on
difference cron anacron
Wiz
BTW I ain't expert in either, lol.
For machines that get powered down, anacron is often used.
You can get an idea of how they work and differ with a search on
difference cron anacron
Wiz
BTW I ain't expert in either, lol.