Time Stamping Events And Counting How Many Occurred In The Last N Number Of Seconds?

I have an application where event driven events are already detected. Each time an even is detected I increment a counter.I would like to add the following functionality:

1.) I would like to create a time stamp each time an event is detected and store them in some kind of data structure.

2.) I would like to count how many events are being stored (or in essence count how many events have occurred in the past 10 seconds, not once but continuously).

3.) I would then like to discard of any events older than 10 seconds note events are interrupt driven and can occur more frequently than once a second, but updating my count of how many events have occurred in the past 10 seconds can be done as infrequently as say once a second.