The formula of angular frequency or angular speed is given by:
ω = 2∏ / T = 2∏f
Where we have:
ω: angular frequency
T: period
f: frequency
For movement alone a circle, we have:
ω = dθ / dt
Where θ is the angle change.
If we know the radius of the circle is R, then we can determine the velocity by:
v = Rω