spare time

:  to forbear to destroy, punish, or harm

:  to refrain from attacking or reprimanding with necessary or salutary severity

:  to relieve of the necessity of doing or undergoing something

:  not being used

:  held for emergency use

:  being over and above what is needed :  superfluous

:  a spare tire

:  a duplicate (such as a key or a machine part) kept in reserve

:  the knocking down of all 10 pins with the first 2 balls in a frame in bowling

:  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