The term "cycle" (or "cyclic") is a versatile word with distinct meanings across numerous fields, ranging from economics and biology to mathematics and the arts. In social science, it appears in concepts like the business cycle, which tracks GDP fluctuations, and Arthur Schlesinger, Sr.'s cyclical theory of American politics. In entertainment, a literary or song cycle describes a series of connected works, and the word titles various media, such as a 2017 Marathi film and Frank Sinatra's 1968 album Cycles. Scientifically, the term is vital in mathematics for graph theory and repeating sequences, in computing for instruction cycles and render engines, and in biology for processes like the menstrual cycle. The word also describes mechanical vehicles like bicycles and motorcycles and serves as a unit of frequency (cycles per second). Perhaps most intriguingly, in baseball a "cycle" is a rare feat where a player hits a single, double, triple, and home run in one game.