how to tell server my extension script reports only every 2 hour

I have an extension script to check RAID status every two hours on the
client side (interval 2h). It works fine. The status turned PURLE after 5m.
I guess the server was expecting the data every 5m by default. How can I
tell the server to expect it every 2h instead, for this particular test
(and/or for this particular client)?