repair or maintenance
I think you're right. You're going to have as many different answers as replies.
My version of maintenance is routine type stuff like oil/filter changes, tires, brakes, etc. Some items depend on their age. Clutches, shocks, springs, tie rod ends would be repairs if done early in the cars life. Otherwise on a high mileage vehicle, they would be considered maintenance since these do have a finite life span that would not necessarily end the cars duty cycle. Anything that requires tearing down an engine or tranny would be repair regardless of age.