at a time

: the measured or measurable period during which an action, process, or condition exists or continues : duration

: a nonspatial continuum that is measured in terms of events which succeed one another from past through present to future

: leisure

: to arrange or set the time of : schedule

: to regulate (a watch) to keep correct time

: to set the tempo, speed, or duration of

: of or relating to time

: recording time

: timed to ignite or explode at a specific moment