How do I puse an animation?

I am using animator, i have an stunn animation and stunn hit, i want to use stunn hit while stunn is waiting. more then that, I want that if he only got stunned he will get out of it at the same time that it's will take him to when he get hit while stunn. basically I want just to animate an hit while stunn without affecting the stunn time.

I tried to do it with time calculation but it didn't go well.