The GRE exam is flexible and offered multiple times throughout the year, making it convenient for students worldwide. The GRE General Test can be taken almost any day at authorized test centers, allowing candidates to schedule their exam based on personal readiness. However, it can be attempted only once every 21 days and up to five times in a rolling 12-month period. In contrast, GRE Subject Tests, which focus on specific fields like Mathematics, Physics, or Psychology, are available only three times a year. This flexible schedule allows students to plan their preparation carefully and choose a date that aligns with their academic goals and application timelines.