unfrequent

Adjective

Not frequent; not common; not happening often; infrequent.

Japanese Meaning

頻繁でない / あまり起こらない / 稀な

The unfrequent thunderstorms in this region make each rainfall a notable event.

この地域では雷雨がまれで、降るたびにその雨が特別な出来事になります。

Sense（1）

Not frequent; not common; not happening often; infrequent.

He was labouring under a pleurisy, which is not unfrequent in the mountainous region, at this season.

more unfrequent

（ comparative ）

most unfrequent

（ superlative ）