[new-unit] Frequency/Wavelength property

[balporig]

Description

Frequency/Wavelength property

Units to be added

Unit name	Property	Reference to the conversion formula
1/Second	Frequency	Frequency - Wikipedia
Cycle/Second	Frequency	Frequency - Wikipedia
Degree/Hour	Frequency	Frequency - Wikipedia
Degree/Minute	Frequency	Frequency - Wikipedia
Degree/Second	Frequency	Frequency - Wikipedia
Gigahertz	Frequency	Frequency - Wikipedia
Hertz	Frequency	Frequency - Wikipedia
kilohertz	Frequency	Frequency - Wikipedia
Megahertz	Frequency	Frequency - Wikipedia
Millihertz	Frequency	Frequency - Wikipedia
Radian/Hour	Frequency	Frequency - Wikipedia
Radian/Minute	Frequency	Frequency - Wikipedia
Radian/Second	Frequency	Frequency - Wikipedia
Revolution/Hour	Frequency	Frequency - Wikipedia
Revolution/Minute	Frequency	Frequency - Wikipedia
Revolution/Second	Frequency	Frequency - Wikipedia
RPM	Frequency	Frequency - Wikipedia
Terrahertz	Frequency	Frequency - Wikipedia