 As of 2014, there are four NUAT a year; however, it is not same for every district, and some have only two exams a year for freshmen and sophomores.While the NUAT for freshmen and sophomores is held in March, June, September, and November, seniors take tests in March, April, July, and October to avoid overlapping with months when the CSAT Simulation is held (June and September).These two tests are appropriate for relative evaluations such as measuring average score, percentage, or ranks since the PCSAT has more similar sample groups to the CSAT than private mock tests do.