1611. Cotgr., Infrequence, vnfrequencie, solitarinesse.
1662. Glanvill, Lux Orient., 133. This may be the reason of the unfrequency of their appearance.
1753. Miss Collier, Art Torment., 224. The frequency of corporal punishments, and the unfrequency of rewarding men.
180212. Bentham, Ration. Judic. Evid. (1827), V. 708. The comparative unfrequency of criminative perjury.
1834. Goods Study Med. (ed. 4), IV. 397. A point, however, of less importance, from the unfrequency of their occurrence.