Scheduled tasks, how to make every 1h:30mins?

[minx]

Hi, just wondered if it's possible to run a cron every 1 hour 30 mins? I'm running a task at the moment every 59m... but for a ccbill reversal check, works fine but its just a little too quick to avoid the error from ccbill "too many requests" i just wanna keep my logs down etc etc, please advise, cheers

[Lats]

Edit the scheduled task in ACP -> Scheduled Tasks -> Scheduled Tasks Manager -> ccbill check -> Edit -> Go and select 1 from the hour dropdown.