The term 'from time to time' is used to describe something that happens OCCASIONALLY or intermittently. The crossword solutions for this term include 'OFTEN' (5 letters), 'now and then' (10 letters), 'on occasion' (10 letters), 'ever and anon' (11 letters), 'every so OFTEN' (12 letters), 'OCCASIONALLY' (12 letters), 'once in a while' (12 letters), 'every now and then' (15 letters), and 'when the urge hits' (15 letters). All of these phrases are used to describe something that happens infrequently, but not necessarily at regular intervals.