"Respect to time" indicates that we are considering how something changes as time progresses. It implies that we are analyzing the relationship between two variables where one variable is time itself.
Related terms
Independent Variable: A variable that can be freely chosen or manipulated and often represents inputs or conditions affecting another variable.
Dependent Variable: A variable whose value depends on another variable; it's typically what is being measured or observed.
Time Interval: A specific duration or period used to measure changes occurring within certain bounds of time.