If you could pause time, there would be no way to measure “how long” it was paused for.
Actually that’s not true. If you stop time and everything on you is still effected by time, you could bring a watch with you that would continue ticking while everything else is stopped.
My 57-year-old dad insists that we play Mario Kart every time I come home to visit and plays as Luigi so he can scream “hasta Luigi” as he passes people