dìng​qī HSK3

periodic

定期 dìng​qī
periodic adverb
at set dates or regular intervals

We should have regular physical check-ups.

fixed-term adjective
limited to a fixed period of time

I put this money into a fixed-term deposit.

Frequency

Movie subtitles
3.04 per million appears in 2% of films
Written text
31.4 per million

Details

HSK 2.0
Level 6
HSK 3.0
Level 3

Sources

Definitions
CC-CEDICT