有时，偶尔，间或，不时，时而

1. sometimes, occasionally, at times, from time to time, now and then, once in a while, at intervals

adverb (fukushi) nouns which may take the genitive case particle 'no'

季节性的；属于某个季节的；适合(某个季节或场合的)

2. seasonal, of the season, appropriate (for the season or occasion)

noun (common) (futsuumeishi) nouns which may take the genitive case particle 'no'