qí​cì HSK3

secondly

其次 qí​cì
secondly conjunction
used to introduce the next point in a list or sequence

First you should study hard, and then you should exercise.

secondary pronoun
next in importance, quality, or rank

Quality is the priority, while price comes second.

Frequency

Movie subtitles
10.2 per million appears in 5% of films
Written text
45.5 per million

Details

HSK 2.0
Level 4
HSK 3.0
Level 3

Sources

Definitions
CC-CEDICT