Is there a good and easy Way to implement "min Seconds between Playing" when playing an audioSource

On the top of my head you could do something like this:

 private const float myMinDuration = 0.5f;
 private float myTimer = 0;
 
 
 void Update()
 {
     myTimer -= Time.deltaTime;
 
    if(reachedMark && myTimer <= 0)
    {
       myTimer = myMinDuration;
       //Play sound
    }
 }
 

I wrote this here in the browser so it is not tested code, might have some syntax errors. I assume you alreaady have the logic to check if something has reached the mark so that is why I just check against a bool called "reachMark". If you have reached the mark and the timer is currently 0 or below you will be allowed to play sound. When we enter the if statement we set the timer variable to 0.5f again so if we reach the mark again before 0.5 seconds has passed the sound would not play.