Assertion: period | /r/HasProperty | the time
Facets:
Source sentences:
text: The period of a pendulum is the time it takes from one side to the other and back.
text: The most fertile period (the time with the highest likelihood of pregnancy resulting from sexual intercourse) covers the time from some 5 days before until 1 to 2 days after ovulation.
text: Whereas the period is the time an object takes to go around in a circle, the frequency is the number of circles the object makes per unit of time.