Deadline for the "open" number of hours for the designated person / resource under the IT contract?

Quick question ... my wife is developing a small agreement for her IT company she works for to work with another IT company where her company will provide or assign programmers without limiting or specifying the time over which the resource will be assigned.

Both companies worked before, and the agreement included a table of data on the cost per hour of the resource, depending on its level and the maximum number of hours that can be written off.

In this case, since they will assign a resource, they need to replace the number with a word or a very short phrase that describes that the number of hours is the total number of hours the resource has been working on.

I'm not sure what would be a good word ... could it be "Open"? Or "No Limits"? Or "Hours worked"? I'm not sure and I've tried searching the internet but couldn't find what I need that works for me.

Any help is greatly appreciated as she needs to submit the project tomorrow. Thanks!!