A "twenty-second" is a unit of time that equals 20 seconds. It is commonly used in various contexts, such as sports, music, and everyday activities. For example, in track and field, a runner might aim to complete a race in under twenty seconds, while a musician may count beats in twenty-second intervals. In the context of time measurement, the twenty-second is part of the larger system of seconds, minutes, and hours. It is often used to time short events or intervals, such as a cooking timer or a stopwatch during a workout.