depends on how thick the hair is, and just how fast it grows... i do it! lol sounds gay, but it looks good! for me it lasts about 2 weeks before i see anything at all.. i do it ~once a month..
you could go with one of the epillady devices. we call it the poor girls wax. lasts about 4 to 6 weeks although depending on your pain tolrance it can hurt. basicaly it pulls out the hair like rotating tweezers. lol its really not as bad as it sounds just remember to exfoliate everyday in between to avoid ingrown hairs..