Is it possible to have a separate animation timeline in another layer? I would like to have different animation speeds for different objects in the same scene. Having a separate timeline would help but I can't find an option to do that.

If it is not possible to create a separate timeline, what should I do to have different animation speeds?
I've achieved my goal by simply increasing the needed amount of timeline frames and duplicating and extending everything I need to be short into a loopable manner.
This way I can animate different objects to go faster or slower in the same scene.