Why are clockwise and counterclockwise referred to as “senses,” rather than directions?

Hello there!

Let's suppose that are directions

Suppose that the hour hand of the clock is on the 3, then the "direction" clockwise points down, and the direction "counterclockwise" points up.

Now if the hour hand is in the 12, the clockwise "direction" points to the right, and the counterclockwise points left.

Then you can see that the direction changes depending on where are we looking, this is the reason for them to be called "senses", because in this way you don't need to, for example, use the position of the object which movement is being described.

c)as speed changes, wavelength and frequency change.

everything changes!