How often is once in a while - I would say once in a a while would be once a year possibly twice but not more than that but I don't think that once a week could be considered once in a while do you?

Answer 1

The phrase "once in a while" is actually quite ambiguous. Different people have different ideas about just how long a while is. But I agree that something done once a week is rather frequent to be described as once in a while.