Repetition, or recurrence, refers to the act of doing or experiencing something multiple times. This concept is often observed in various fields, such as literature, music, and psychology. In literature, for example, authors may use repetition to emphasize a theme or idea, while in music, repeated melodies can create a sense of familiarity and structure. In psychology, repetition plays a crucial role in learning and memory. The more frequently information is encountered, the more likely it is to be retained. This principle is often applied in educational settings, where techniques like spaced repetition help improve long-term retention of knowledge.