I know about the Sync key, but in some instances especially when doing time lapses, I would like to space the keyframes out relatively evenly without having to go into each keyframe to edit the time values. A simple timer would allow us to accurately judge that a certain amount of time has lapsed.
Basically, if I want to space the time keyframes 15 seconds apart, at this point I would have to manually adjust each of them because my own internal clock is not accurate enough to judge 15 seconds reliably.
I have no idea if I am making any sense, it's hard to explain what I have in my mind.