How to trigger if X events over Y period?

[jhmartin]

Is there a way to have a trigger based on an item exceeding a threshold X times over the last Y period? An example would be ping failures -- if a ping failure occurs 10 times over the last 24 hours (but not necessarily consecutively), I want to have a trigger activate so that I can send a message to the trouble ticketing system.

A seperate trigger alarms and sends an email whenever a ping failure occurs 2 consecutive times, but the idea is to catch alarms that occur frequently enough to indicate a pattern but infrequent enough such that multiple busy SA's miss the pattern.

[Alexei]

An example would be ping failures -- if a ping failure occurs 10 times over the last 24 hours (but not necessarily consecutively)...

I do not see how this could be configured using existing functions. For consecutive value try something like {host:item.min(#10)}>0