xiān​hòu HSK5

priority

先后 (先後) xiān​hòu
priority directional
the order of occurrence; being early or late; the relative timing of events

One must prioritize tasks based on their importance and order.

successively adverb
one after another; in succession; repeatedly over a period of time

They arrived at the destination one after another.

Frequency

Movie subtitles
1.46 per million appears in 1% of films
Written text
74.5 per million

Details

HSK 3.0
Level 5

Sources

Definitions
CC-CEDICT