I don't know where you live but here in south Germany the whole FM band from 87.5 up to 107.9 is heavily polluted by stations and mirrors of mirrors of stations. Scanning through the whole range it's not rare that you'll find the same stations at four or more frequencies. To answer the question about scanning for frequencies, the FM receiver would not be needed as signal strength detection is also a feature of the FM tuner hardware. It just has to be utilized.