SECTION VI. TIME
Frequency. –N. oftness; repetition.
Infrequency. –N. infrequence, rareness, rarity; fewness; seldomness; uncommonness.
Thesaurus of Words and Phrases by Peter Mark Roget, M.D., F.R.S. Enlarged by John Lewis Roget, M.A., New Edition Revised and Enlarged by Samuel Romily Roget, M.A. Published by Grosset & Dunlap, the edition is copyright 1941, 1947.