What is the meaning of Hertz?

In the International System of Units, the derived unit of frequency; one (period or cycle of any periodic event) per second. Symbol: Hz

hertz (unit of frequency)

hertz. Symbol: Hz

hertz

hertz

hertz

hertz (unit of frequency)

hertz (unit of frequency)

hertz

hertz

hertz (singular and plural)

Source: wiktionary.org