Name the type of angle that is constrained to lie within a single revolution

[dmcclean]

Given that Angle already names the type of arbitrary angles, what is the best name for the type of angles that are constrained to lie within a single revolution? (Alternately, the type of angles that are equated if they differ by an integer number of turns.)

Both types are all over the place.

We should keep Angle for the one it denotes now, for consistency with the way we treat Time and Temperature and so forth as unbound from any particular distinguished origin.

[bjornbm]

Don't have any solid ideas on this one. In my use cases the one you describe tends to come up as an orientation while that of Angle comes up as a rotation.