sî-lî時而

from time to time

from time to time; occasionally; sometimes; now... now...; sometimes... sometimes... (used reduplicatively)

adverb

English Wiktionary, “時而” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%99%82%E8%80%8C · confidence: Medium (Wiktionary, Hokkien)