When setting your MIDI clock you may see reference to PPQ/PPQn and PPS. This refers to Pulses Per Quarter Note and Pulses Per Second. 

MIDI Clock will normally run at a rate of 24 PPQ which means that the speed of the clock will vary with the tempo of the Clock Master. 

MIDI Clock does not carry any information on where in a sequence the Slave device should be playing, it only communicates the tempo.