From its resting position, how long does it take the weight to bounce one direction, then the other, and then return to its resting position?

The first position is at rest, that is 0 seconds, then it goes one direction up to 0.75 seconds and starts returning to original position, it reaches original position again at 1.5 seconds, and goes in the opposite direction up to 2.25 seconds, then starts returning and hits original position once again at 3 seconds