Catastrophe definition, a sudden and widespread disaster: the catastrophe of war. See more.
1 Total Time: The computer-delivered GRE takes 3 hours and 45 minutes for the average student.  Experts recommend sitting for the GRE exam one year prior to entering graduate school. This allows for ample study time and the option to retake it if desired.
Nowhere is this truer than in late summer and fall season, when applications are most often due. According to ETSâs page for test centers and dates to take the GRE, âYou can take the computer-delivered GRE General Test once every 21 days, up to five times within any continuous rolling 12-month period (365 days).â.