classical mechanics - Types of circular acceleration?

To my knowledge there are three types of acceleration when a body (e.g. a rod) is moving in a circle about an axis. These are:

1. 
   

   Angular acceleration : this is the rate of change of angular velocity.

   
   
   


2. 
   

   Tangential acceleration : this is the linear acceleration of the system in a tangential direction to the circle and equals the radius times the angular acceleration.

   
   


3. 
   

   Radial/centripetal acceleration : this is the linear acceleration of the system that is directed inwards towards the center of the circle.

   
   

I also think there are two types of velocity:

1. 
   

   Linear velocity: this is its velocity in the tangential direction and is constantly changing

   
   


2. 
   

   Angular velocity or angular frequency: this is the rate of change of angle.

   
   

Is the above correct? And have I missed anything?

Answer

No. Frequency is defined as 2π*θ/t where theta is the angle rotated for a time t. You maybe tempted to equate frequency to angular velocity. But it is not so. Angular velocity = dθ/dt. Angular frequency= 2*pi*(Integral of x over time interval t)/t