The phrase "what time frame" is grammatically correct and can be used in written English.
It is often used to ask about a specific period of time or timeframe. Example: "Can you please clarify what time frame you need the report by?".
At what cost and over what time frame?
Boeing, he said, is trying to establish "during what time frame we can get an all-new airplane done that our customers will pay for.
"And if that doesn't work, then we'll see under what conditions and by what time frame we'll do the alternative actions".
But no matter what time frame the actors are in, we are always in "today," responding right now to the events unfolding on the stage.
Airbus executives have told analysts that they must sell about 240 of the planes before turning a profit, though they will not say within what time frame.
"When they are, we'll work with the banks on how best to release the appropriate data and on what time frame to ensure fairness and minimize market uncertainty".
However, because of the complex nature of eating behaviour and the chemical heterogeneity of foods, it remains very difficult to ascertain which aspects of diet, in what quantities and over what time-frames are responsible for modifying risk.
This essentially 'socialising vouchers' in a way which makes a lot more sense that the hammer of group-buying offers which just spam users with offers with no data about what time, place or frame of mind they're in.
The UK Supreme court is expected to interpret what the time frame should be next year.
"So I don't know what the time frame would be because of those".
He said he did not know what the time frame for his return would be, because he did not want one.
