Number of times a Triggering Condition is met before an action is initialized?

I want to do define the number of times a triggering condition is met before an action can be initialized in one single simulation run. For example, I want a vehicle to accelerate to 12m/s when it reaches a TTC=5s to ego car for the THIRD time during one single simulation run, not for the first time when TTC=5s. Any way to define that?