The period of the dinosaurs lasted up to 65 million years.

I have a periodic meeting with my team every month.

I subscribe to a periodical that is published monthly.

I go to the gym periodically to stay in shape.

I experience cramps during my menstrual period.

I experience discomfort during my monthly period.

The bank allows a grace period of two weeks for payment of the loan.

The movie is a period piece set in the 18th century.

The periodic law states that the properties of elements are periodic functions of their atomic numbers.

The periodic table organizes elements based on their atomic numbers.