Wittgenstein in Tratta write as follows: "6.3611 Processes can not be comapred with "time passing" - there is no such thing - but only with other precesses (eg chronometres walking). Only on the basis of some other proces can you describe the time waveforms."
For this reason, I suggest defining time as the oscillation of the object relative to the object and the measure of the time of the other in relations to one oscillation to the other.