infrequent
🇺🇸
/ɪnˈfriːkwənt/
🇬🇧
/ɪnˈfriːkwənt/
Something that happens only a few times or not very often.
Eruptions of the volcano are infrequent, so we were lucky to witness one.
火山爆发是不常见的,所以我们很幸运能目睹一次。