on own time

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on (one's) own time

When one is not actively working at one's job; in one's free time. It's hard to pursue a degree on your own time when you're also working a full-time job.
See also: on, own, time

on one's own time

not while one is at work. The boss made me write the report on my own time. That's not fair. Please make your personal telephone calls on your own time.
See also: on, own, time