Angular velocity is that velocity which act on revolution or rotation of a body with a certain angle with axis with valid radius.i.e the rate of change of angular rotation.
Angular velocity ω=dθ/dt
Angular frequency also known as radial or circular frequency, measures angular displacement per unit time. Its units are therefore degrees (or radians) per second.
ω=2πf or 2πT
The key difference is that one is a vector quantity while the other is a scalar.