Your drawing is still in the frequency domain, instead of in the time domain.

To show that you do understand, your picture should have been time-based and shown:

First example:
5 period taking 1ms => 5*1/0.001 = 5*1000 = 5kHz

Second example:
1 period taking 45.5ms => 1/(45.5*0.001) = 1*1000 / 45.5 => 22Hz

When working in the time domain, you don't base your diagram on any frequency (since the frequency is an unknown), but on a number of periods and a measured time. The frequency is what you get out as a result of your computations.

For slow speeds, you wait until you have measured one single period, or until you have reached the zero-speed timeout. For higher speeds, you continue to measure until you have accumulated enough time to have an acceptable precision (or reached the requested display update interval).