Wiktionary
timing out
vb. (present participle of time out English)
Usage examples of "timing out".
He began counting in his head, timing out how a man in a suppressed panic might walk to one room, then another.
He tried to go on timing out, just go away and blind himself with the lights and not to let his heart flutter, the way it felt it was doing.
Jim had run merrily amok for a while, inexorably pushing Spock into what looked like a wholly defensive position in the center-cubic upper levels, then timing out both his rooks, one of his knights, and several pawns in rapid succession, in what was meant to be a nettling display of security.