Full Idea
Aristotle says time could not be the same thing as change, for first change can go at different rates, but not so time, and secondly change is confined to a part of space whereas time is universal.
Gist of Idea
Unlike time, change goes at different rates, and is usually localised
Source
report of Aristotle (Physics [c.337 BCE], 218b11-) by Robin Le Poidevin - Travels in Four Dimensions 02 'As Change'
Book Reference
Le Poidevin,Robin: 'Travels in Four Dimensions' [OUP 2003], p.15
A Reaction
The observation that the speed of change varies seems to need a belief in uniform time. Le Poidevin doubts Aristotle's objections, because the theory concerns change in general, and not particular instances of it.