時不時
shí​bù​shí HSK7

from time to time

  1. 时 時 shí adverbverb
    sometimes
    used in the pattern "shí... shí..." to mean "sometimes... sometimes..." or "now..., now..."
  2. 不 bù adverb
    not
    Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings
  3. 时 時 shí adverbverb
    sometimes
    used in the pattern "shí... shí..." to mean "sometimes... sometimes..." or "now..., now..."