The term 'not too often' can be described by the crossword solutions of RARELY (6 letters), OCCASIONALLY (12 letters), once in a while (12 letters), and every now and then (15 letters). RARELY means that something happens very infrequently, while OCCASIONALLY implies that something happens from time to time. Once in a while suggests that something happens sporadically, and every now and then implies that something happens at irregular intervals. All of these terms indicate that something does not happen too often.