The phrase "a small window for" is correct and usable in written English.
It can be used to describe a limited opportunity or timeframe for something to happen or be done.
Example: "There is a small window for submitting your application, so make sure to do it before the deadline."
Alternatives: "a brief opportunity for" or "a limited timeframe for".
The supreme leader left open a small window for a legal challenge to the vote.
We are acutely aware that there is a small window for action and the Board of CGE has met today in London to discuss this.
If brands had a small window for consumers' attention before the digital revolution, they have even less time now—and the real estate on mobile devices is tight.
Since the car won't go into production until next year, there's no instant answer and there's a small window for other automakers to introduce competition.
In our experiment, we observed that there was only a small window for the oxygen partial pressure to produce pure VO2 thin films on the Al2O3 buffer layer.
Finding viewpoints and relating them to real-life stories with a new angle even if they represent a small window for discussion or engagement gives birth to new opportunities never-before imagined.
The rules of the program are straightforward, allowing for a small window of time for the mother to reconsider her decision, to get supervised help if that is what it will take for her to overcome her problems, or to go forward with her decision and allow the baby to be placed in foster care or up for adoption.
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David Cooper, a spokesman for the league, said he thought there was a small window of opportunity for a resolution since he believed the majority of players wanted to reach a collective bargaining agreement.
If Blockbuster could score even a small window of exclusivity for its rentals, Weichselbaum says, "that would be one way for Blockbuster to stay in the game".
The Olympic cycle leaves only a small window of opportunity for getting pregnant.
