If there is a rotation, "angular velocity" and "angular frequency" is the same thing. However, "angular frequency" can also refer to situations where there is no rotation.

Angular frequency differs from frequency by factor '2Pie'. It has the dimension of reciprocal time(same as angular speed). Its unit is radian/sec. Or you can simply say that angular frequency is the magnitude of angular velocity(a vector quantity).

Scalar. Angular frequency vector is roughly synonymous with angular velocity.

Angular frequency is related to linear frequency as

w = 2 x pi x f wher w = angular frequency

linear frequency is cycles per second, or number of oscillations per second, called Hertz

angular frequency for f = 1 = 2 pi f = 2 pi, or one revolution. It has units of radians per second