Randomise reachrps and use holdFor

I have been looking for a way to randomise reachrps in throttling and found a post in stackoverflow for the same.

This seem to uncontrollably inject requests.

Is there a way to include holdFor in the test to have randomised reachrps to run for desired duration and for the next iteration there would be random reachrps.

Thanks & Regards,
Vinod kumar J