Definition from Wiktionary, the free dictionary
- Not frequent; not common; not happening often; infrequent.
1827, George Tucker, A Voyage to the Moon:
- He was labouring under a pleurisy, which is not unfrequent in the mountainous region, at this season.
1916, Fedor Jagor; Tomas de Comyn; Chas. Wilkes; Rudolf Virchow., The Former Philippines thru Foreign Eyes:
- It was no unfrequent event, however, for vessels to be lost.