If you promote the timer to a variable, you can check it in tick or any other function.
Thus, an ability function might look like this, only doing something more interesting than playing a rando editor sound:
(The endCooldown func called there just sets the bool back to false, the true pin is just printing “please wait” lol)
In tick event, you’d query the timer var and plug it into the same math as your update function:
Or just plug the timer var into input of a call to your update func