Single word for "time spent" [closed]

Is there a single word for an amount of time spent on a task for example? More specific than duration?

I can't think of a single word, except maybe hours. People talk about the hours they worked on something. "How many hours do you have in this week?"

I saw that one time-tracking site called time spent on a task "active time," and another called it "tasktime" (one word, but coined, I think). In an office setting, it could also be called "billable time" or "billable hours."

I did my stint in the kitchen yesterday.

a period of time spent at a particular activity

You can't really spend time. You can spend money, though, and you can use the Time is Money metaphor theme.

In the paper linked above, the object of spend is called "perceived duration", because it's general over all uses of the metaphor. However, in a specific task-oriented time accounting context -- where Time really is Money -- I think self-explanatory labels like "Total time spent by all workers on task X" or "Mean daily time spent by worker Y on task Z" work far better than searching out the perfect one-word label. If they don't fit the space available for labels, give some thought to priorities.

Executive Summary: If it's not obvious to you, it won't be obvious to your readers, either.

You can while time:

: to cause to pass especially without boredom or in a pleasant manner —usually >used with away