Time ≡ the measure of relative change.
that definition seems a bit empty to me.
Time seems like the collective motion of objects. If more objects move, time is said to have passed more. If no objects move time is said to have not passed at all.
Take for instance, the earth orbiting around the sun. Say the earth was orbitting but everyone on earth did not age and were frozen did not move or think. Time would be said to not be moving. The amount of objects moving is what determines how much time has passed, if only one or two objects move they are said to be outside of time, if only a bunch of objects move together seemingly correlated with each other it is said to be big time.
I don’t think so. Whether you have only one clock or 10,000 clocks, do they read differently?
Granted if there was not even one clock of any kind, not even in the mind, time could not be known.
It is not how many things move, but rather how much each move compared to the others.
Ten thousand clocks would not automatically give the same reading as altitude and speed and gravity affect them
And so if they were significant distances from each other then they would not all be telling exactly the same time