Angular velocity and angular frequency are related concepts, both measured in radians per second. Angular velocity refers to the rate of change of angular displacement, while angular frequency is specifically associated with uniform circular motion and sinusoidal oscillations. Angular frequency can only be defined when an object rotates with constant angular velocity. The relationship between them is expressed as ω = 2πf, where f is the frequency. Understanding these distinctions is crucial for applications in physics, particularly in circular motion and oscillatory systems.