'within a specific period' is a correct and usable phrase in written English.
You can use this phrase to refer to a length of time, such as a few weeks, a month, a year, or any other amount of time. Here is an example: "I need to finish this project within a specific period of time."
The Reagan order eliminated a Carter requirement that most documents be declassified within a specific period.
And it recommends that the services be required to remove infringing users within a specific period, perhaps a week, once they are identified.
For example, he said, most contracts are contingent upon the purchaser's obtaining a commitment for a mortgage within a specific period of time.
Most of the group programs require a minimum of 10 travelers, all of whom must fly to a specific destination within a specific period.
They have to be made to strict medieval standards, based on a 50-year range within a specific period, usually some time in the 1300s.
Today's warning was the first, however, in which either agency had issued a warning of an attack within a specific period -- in this case, several days.
It is a contradiction in terms to say that an authority to carry on a particular business within designated limits for a specific period, which has been expressly granted by a binding contract, may be taken away at her pleasure, in the exercise of that power.
Multimorbidity is defined as the co-occurrence of two or more chronic diseases within one person in a specific period of time [ 15].
When workers are separated and the notices are obtained on a request basis, or when workers are working less than full time and the agency requests information, it is essential to the prompt processing of claims that the request be sent out promptly after the claim is filed and the employer be given a specific period within which to return the notice, preferably within 2 working days.
An important measure of natural ecosystems is the biological production of its plants and animals that is, the total amount of biomass produced by living organisms within a given area in a specific period of time.
It is useful to law enforcement because it can allow investigators to view the movement of all devices within a specific area over a specific period of time to track down suspects or witnesses in cases that otherwise might go cold.
