ān​quán​qī

safe period

安全期 ān​quán​qī
safe period
The time in a woman's menstrual cycle when the risk of conception is lowest, typically used as a natural method of birth control.
safety period
A period of time during which safety can be guaranteed.

Frequency

Movie subtitles
0.030 per million appears in 0% of films
Written text
0.218 per million

Sources