The phrase "a window frame" is correct and usable in written English.
It can be used when referring to the structural component that holds the glass of a window in place.
Example: "The carpenter carefully measured the dimensions to create a perfect fit for the new window frame."
Alternatives: "a window casing" or "a window structure".
He thought they might have been parts of a window frame, although the garage didn't have windows.
When the dust clears, Keaton is still standing there, spared by a window frame that has passed directly over him.
A ballerina stretches and bends inside a window frame, in an allusion to the building's 10-by-10-foot 10-by-10-foot 10-by-10-foot 10-by-10-foot
He exaggerated the sense of depth with oblique lines, formed by the edge of a road, the front of a house, flooring or a window frame.
I was shoulder-deep, slamming at something — a window frame, shattered mullions and teeth of glass — when the cell in my right front pocket began to ring.
A domesticated squirrel, nowhere to be seen, has been dining on a window frame in the sitting room, near the Audubon reproduction of the belted kingfishers.
In one "Twilight" image, a middle-aged pregnant woman, is seen from inside a house through a window framed with white curtains.
At the bottom of the room, a window frames a narrow view of the water's surface, reducing it to an abstraction; the mood shifts along with the changing pattern of the waves.
A window framed the early light on a strange sea it wasn't Leblon, maybe not even in Rio.
His efforts to start a tavern, a store and a window-framing business all failed.
The fuel cell design in this study incorporates a window-frame structure that provides a large open area for more efficient mass transfer and is modular, making it possible to fabricate components separately.
