## Wikipedia - Hertz (it) Wikipedia - هرتز (ar) hertz

https://doi.org/10.1351/goldbook.H02785
SI derived unit of frequency equal to one cycle per second, $$\text{Hz} = \text{s}^{-1}$$.
Sources:
Green Book, 2nd ed., p. 72 [Terms] [Book]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 976 [Terms] [Paper]