360 Idle Quality

Maybe bad wording on my part. When speaking of a cam that is 4 degrees advanced, the 4 degrees is measured in crank degrees, correct? 4 crank degrees = 2 cam degrees. If the 4 degree advance is measured in cam degrees, then the cam would be advanced 8 crank degrees. Which is it?

It's my understanding that all cam specs are in crank degrees except for lobe separation angle, which is in cam degrees.

The other option is that I'm seriously confused, which is not out of the question.
It can get confusing. Here's what no one has spelled out for you. When speaking of advancing or retarding a camshaft, Lets say "we're gonna advance the cam 6 degrees". What that means is, we're advancing the CAMSHAFT six degrees at the CRANK. Camshaft degrees, even though we're moving the camshaft, are spoken about in crank degrees. 6 degrees at the crank = 3 degrees at the cam, since the cam turns half crank speed. But, everyone speaks in crank degrees, since that's how an engine's timing is read. Make sense?