Periodicity

Periodicity is the quality of occurring at regular intervals (e.g. of time) and can occur in different contexts:

• A Clock marks time at periodic intervals.
• A Metronome ticks at periodic intervals.
• A publication published at periodic intervals can be called a "periodical", though it can also be called Magazine.
• In Mathematics, a function which recurs periodically is called Periodic function.
• In Chemistry, a table which classifies elements by means of periodicity is the Periodic table.

The measure of periodicity is Frequency.

See also: Synchronicity, Simultaneity.