off duty
• not engaged in one's regular work.
• "an off-duty police officer saw the incident"
on duty
• engaged in one's regular work.
• "there were only two doctors on duty that night"
Similar:
not working,
at leisure,
on leave,
off,
off work,
free,
on holiday,
working,
at work,
busy,
occupied,
engaged,
on call,
on standby,
on the job,
tied up,
