CYCLED

An interval during which a recurring sequence of events occurs

Example: "The never-ending cycle of the seasons"

A series of poems or songs on the same theme

Example: "Schubert's song cycles"

A periodically repeated sequence of events

Example: "A cycle of reprisal and retaliation"

The unit of frequency; one hertz has a periodic interval of one second (named for heinrich rudolph hertz)

A single complete execution of a periodically repeated phenomenon

Example: "A year constitutes a cycle of the seasons"

A wheeled vehicle that has two wheels and is moved by foot pedals