The research library kept multiple periodic tables from different eras for historical analysis.

Astronomers measured the planet's rotational period by tracking surface features against the background stars.

The rotation period of the newly discovered exoplanet suggests it completes a full spin in less than ten hours.

Your notice period begins on the day the dismissal letter is delivered and continues until your last working day.

Researchers compared the gestation periods of several mammal species to understand reproductive adaptations.

Managers should be cautious after project launches, as honeymoon periods can mask underlying issues.

Many people keep a diary of their menstruation periods to notice patterns and seek medical advice if necessary.

Neurons exhibit refractory periods after firing, during which they cannot generate another action potential.

Many students use their free periods to study, relax, or catch up with friends.

Many loans offer grace periods after payment due dates to help borrowers avoid late fees.