interdum

Nonnunquam, sometimes in opp. to nunquam and semper, approximates to the meaning of sæpius, like ἔσθ’ ὅτε; interdum, at times, is in opp. to crebro, and approximates to the meaning of rarius, like ἐνίοτε; lastly, aliquando, now and then, is in opp. to semel, and approximates to the meaning of prope nunquam, like ποτέ. The interdum facta denotes actions repeated at considerable intervals of time; the nonnunquam facta, actions repeated at shorter intervals; the aliquando facta, actions repeated at very distant intervals of time. Cic. Sext. 54. Comitiorum et concionum significationes interdum veræ sunt, nonnunquam vitiatæ et corruptæ. And Acad. i. 7. Off. ii. 18. Brut. 67. Mur. 30. (iv. 273.)