to time keep
The duties of a time keeper are to get times of people racing. by nicola thies Timekeepers have the following duties: To record times for track athletes where there is no photo-finish equipment. ...
to keep time muhahahaha!
duty (a moral or legal obligation)
The most important duties of the President are: uphold the law, control the US Military, and keep the peace.
Stadium Map Guide - Black Ops First Strike Walkthrough
Pro Tips with Tsquared - Call of Duty: World at War
Call of Duty: Black Ops Prestige Edition Trailer
IGN Hype Montage: 11.05.10