You can take the GRE revised General Test once every 21 days, up to five times within any continuous rolling 12-month period (365 days). ... Also, taking the GRE multiple time will NOT hurt your chances of admission to graduate school.
Does retaking the GRE hurt you?
Taking the GRE multiple times will not harm your chances of admission. Last year, the ETS (Educational Testing Service—the makers of the GRE) introduced a new feature for test-takers applying to grad school called ScoreSelect.
Do schools see how many times you take the GRE?
GRE Score Select is a score reporting system that allows you to send GRE scores from whichever test date(s) you want schools to see. Schools won't see when you choose not to send GRE scores from a certain test date, so you don't have to worry about them seeing how many times you took the GRE.