Typically, and depending on the insurance company, it takes about four weeks. But I have seen as short as two weeks and as long as eight weeks. Sometimes, the insurance company will miss the 60 day deadline, but that's very unusual.
I agree with my colleagues, but only add that if they are more than 60 days in paying, you may make a motion to compel payment and if you have an attorney that attorney may seek a counsel fee for the delay. Usually, your attys phone call to the adversary solves the rare delay over 60 days.
By answering this question I am not creating an attorney client relationship with you. This should not be construed as legal advice. You shoudl retain an attorney if you seek legal advice.