@Horyzon my update to compliments to support cron type entries was accepted and will be published in the next release (Oct 1)
you can try it today by using the the develop branch of the MagicMirror repo
see the troubleshooting section topic on how to get the develop branch
https://forum.magicmirror.builders/topic/14327/testing-new-fixes-or-solving-current-problems-with-next-release-code
my MMM-Config module has support for this approach today
you can use this page to generate the cron expression
https://crontab-generator.org/
use some dummy command to complete their config operation,
and only take the first 5 space separated fields of the result…
minute hour day month day_of_week