How to check service once in fixed time interval?

So, i need to check some service once in fixed time interval - from 50 to 57 minute of each hour.
If possible.

P.S.
Sorry for my english :slight_smile:

well;
that may not help you, but we “solved” this problem by forcing a check every minute and positionning a check and notification timeperiod from 50 to 57min of each hour.

Thus, we (sort of) ensure that a least a check will be done during this interval (I really mean: “at least”, because you will have more than 1 check done…).

…but if you really want to do only 1 check, you’ll have to find another way (and tell us about it :))