The phrase "a defined time frame" is correct and usable in written English.
It can be used when discussing a specific period during which something is expected to occur or be completed.
Example: "The project must be completed within a defined time frame to meet the client's expectations."
Alternatives: "a specified time period" or "a set duration".
The underlying mechanic of this model is that the adjacent viable defines an area of potential innovation, based on an expected increase in viability within a defined time frame.
An RPS makes it incumbent upon a state, or even a country, to procure a certain amount of power from renewable sources, typically within a defined time frame.
Therefore, it is important for the U.S. to address this central Israeli concern in a serious and determined way within a defined time frame and within the Palestinian-Israeli and Syrian-Israeli contexts, as part of a broad regional plan, and as a component of an Iranian-U.S. dialogue.
The UD is defined as a probability distribution of finding an animal in any given cell within a defined time frame [57].
However, this issue may be of concern when attempting to determine more accurately the number of cell divisions that individual cells have undergone during a defined time frame.
We summed the doses of all dispensed drugs per person during a defined time frame.
You've lived a whole life condensed into a very defined time frame, with a final outcome.
As stated at a hastily arranged Christmas Day press conference in Hong Kong, Thaksin laid out a loosely defined time frame for his homecoming, between February, when a newly elected coalition government is expected to form, and April, at the latest.
Additionally, an object may be available for study within a strictly defined time frame.
A research assistant, assigned to the facility, will administer a short questionnaire to mothers who deliver within the defined time frame.
Qualitative responses were received from seven of the ten entrepreneurs within the defined time frame.
