More heck periods: 2h and 4h
More check intervals: 2h, 4h.
Intervals above 1h may be available on demand depending on how many sites you are monitoring. Please ask support if you want.
Sir Apfelot commented
I would like to have the choice of a 2h ,4h, 8h ,12h or 1 day interval. I would be glad, if you could add more options.