The term "time interval" refers to a specific duration or length of time. It can be used in various contexts, such as measuring the passage of time between two events, describing the frequency and regularity of occurrences, or indicating how often something happens within a given period. Time intervals are typically expressed using units of measurement like seconds, minutes, hours, days, weeks, months, or years depending on the scale of observation. In other words, it is the amount of time that has passed between two points in time and can be used to calculate rates of change, trends, and patterns over a specific period.