Experiment with cron. You may not see what you expect. For us, even though our default.alrt touch is cron’d to occur once an hour, on the hour, in reality the alert action executes 12 minutes after the hour. That said, you could still cron these touches for every two minutes (Yeah, kind of bulky, but it may work for you.) for the hours, days, etc. of your choosing.
Cheers!
Phil
