Lowering skeletal framerate and no interpolation?

Hi, I am working on a project where I have to put more than 200 copies of a the same skeletal animation, each one with a small time offset from the rest.
The frame rate foes very low, so I was looking for a way to limit the engine´s skeletal refres rate of the skeletal animation, if I export the animations with fewer frames and I scale up the play rate to compensate, got the same FPS because the engine interpolates the frames, the engine allways interpolates the skeletal animation as fast as possible. What I want is to lower the interpolation of the engine so it will be less demanding…

Is there any way to do it?

Thank you