In a 2D animation, can I set a diffrent speed per sprite?

I know the best way of adjusting an animation is to make sprites with less difference for the slow movements, and more difference for the fast, but I wonder if you can set a different speed for each sprite in a 2D animation, to control the time each sprite is shown.

Yes, you can, all you have to do is go to the animation window and move the keyframe to the left or right. The closer a keyframe is to another the smaller the time it will “play”.