The phrase "area of both" is correct and usable in written English.
It can be used when discussing a shared space or commonality between two subjects or entities.
Example: "The area of both interests overlaps significantly, leading to fruitful collaboration."
Alternatives: "common ground" or "shared space".
Isis operates as an entity across the border area of both Iraq and Syria.
Until the company's board acted today, workers, managers and elected officials in the area of both plants had been apprehensive.
The use of phthalates is subject to EU restrictions, but this is an area of both shifting research and shifting regulation.
BET analysis is carried out to determine the surface area of both MoS2 and MoS2/g-C3N4.
The addition of branched chains results in a lateral shift to increasing area, proportional to the fraction and projected area of both straight and branched chains.
Two atom bombs were assumed to have gone off -- one over Bushwick and Myrtle Avenues in Brooklyn, and one near the Manhattan-Bronx line, "devastating a large area of both boroughs".
The floor area of both wings is 27,550 ft2560560 m2) on two floors and, in addition to seawater facilities, also includes classrooms, offices and laboratories.
Multiple photographs of the cross-sectional area of both flight borne and airborne solids within the dryer at different loading conditions are processed.
Model comparisons showed that the area of both natural forests and plantations surrounding the study sites influenced burial and removal rates.
Symbolic computation is an important area of both Mathematics and Computer Science, with many large computations that would benefit from parallel execution.
Unique features of the central nervous system (CNS) render it an area of both opportunity and challenge for the application of antisense ODN strategies.
