The game keeps count of the number of revolutions in your save file (in your steam Roundabout savedata folder) under stat.revolves. I had about 33,300 revolutions after about 20 hours of gameplay, so it can take a very, very, very long time to get this achievement. The best way would be to either just let your computer sit there for a long time while the accelleration button was pressed or write a script to make it continuously hop.