How to run systemd timer every ten minutes

The syntax to run a systemd timer every ten minutes is:

how-to-run-systemd-timer-every-ten-minutes.txt

OnCalendar=*-*-* *:00,10,20,30,40,50:00

OnCalendar=*-*-* *:00,10,20,30,40,50:00

i.e. run it on the first second (:00) of every 10th minute (00,10,20,30,40,50).

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