A unit of measure for frequency.
- iOS 10.0+
- macOS 10.12+
- UIKit for Mac 13.0+Beta
- tvOS 10.0+
- watchOS 3.0+
You typically use instances of
NSUnit to represent specific quantities of frequency using the
Frequency is a quantity of occurrences for a repeating event over time. The SI unit for frequency is the hertz (Hz), which is a derived as one occurrence per second (1Hz = 1 / 1s).