You can squat from 0-7 times a week. If a person is still progressing then it is still working no matter how tough it feels. I am squatting 2-3 times a week right now and progressing. But i started squatting decades ago i am 62. And just added them back in a while back. Only doing 3 plates but it goes up every workout. Probably only get up to 4 plates and call it good. As my days of lifting big are over.My strength will go up buy doing 2 squats sessions a week
Maybe I phrase the question wrong I was asking do you need to squat three times a week