Time is typically measured in units such as seconds, minutes, hours, days, weeks, months, and years. These units form the basis of various systems of timekeeping, including the Gregorian calendar and the International System of Units (SI). Additionally, there are more precise units used in scientific and technical contexts, such as milliseconds, microseconds, nanoseconds, and picoseconds, which are used to measure smaller intervals of time. Ultimately, the choice of the unit of time depends on the level of precision required for a particular application.