Is there a name for a counter that tracks time since an event last occurred?

I'm looking for a single word or short phrase to describe a counter that increments to show how much time has passed since an event occurred. A great example is a "days since last injury" counter.

Simpsons "Days Without an Accident" counter

Ideally this should be generic. My use case is a "time since last exception" in a program.


I would be willing to call that an interval timer, but I am not aware of any standardized name for it.


Intervalometer

Interval meter and interval timer are also valid terms.