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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
for which areas
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "for which areas" is correct and usable in written English.
It can be used when specifying particular regions or fields of interest in a discussion or inquiry. Example: "We need to identify the specific challenges for which areas we should focus our resources."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(1)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
8 human-written examples
Irma will arrive in southern Florida this weekend likely as a Category 4 beast, but its exact path is unclear, which will have huge implications for which areas are hardest hit.
News & Media
This may in turn give some pointers for which areas of the world are holding up better than others, and could be poised for longer term growth.
News & Media
This assisted with having a general idea for which areas were modified and accessed during normal, private, and portable web browsing sessions.
Although the claim that "visual search has no memory" is certainly too strong (Kristjansson, 2000; Peterson, Kramer, Wang, Irwin, & McCarley, 2001; Shore & Klein, 2000), and some argue that the task employed by Horowitz and Wolfe (1998) is flawed (Klein & Dukewich, 2006), it is clear that memory for which areas have been searched is much worse that one might imagine or hope.
There were codes for which areas you could access.
News & Media
The Los Angeles Police Department has released a guide for which areas to avoid, according to the Los Angeles Times.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
52 human-written examples
These were the classes that were extracted as thematic classes from the images and for which area statistics were generated at local situation.
Thus, it is easy to see for which area of δ V and δ k filtering efficiency is acceptable for each particular case (red color surface is over black one).
Twelve submissions for which area chairs were in conflict were reviewed within 'Applied Bioinformatics' headed jointly by the two area chairs and the proceedings chair; four were accepted.
Science
Fourteen papers for which area chairs were in conflict were reviewed under a 'Conflicts Management' section headed by the Proceedings Chair; five such papers were accepted.
Science
Six papers for which Area Chairs were in conflict were reviewed under a 'Conflicts Management' section headed by the Proceedings Chairs; one such paper was accepted in 'Bioimaging'.
Science
Expert writing Tips
Best practice
Use "for which areas" to introduce a more detailed specification, for instance, when detailing resources or responsibilities.
Common error
Avoid using "for which areas" when a simpler preposition like "in" or "within" suffices. Overusing formal constructions can make your writing sound stilted. Instead, use the most direct wording that is appropriate.
Source & Trust
87%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "for which areas" functions as a prepositional phrase, modifying a noun or clause by specifying particular locations, domains, or regions. It helps clarify the scope or focus of a statement, as seen in Ludwig's examples.
Frequent in
Science
29%
News & Media
54%
Wiki
17%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "for which areas" is a grammatically correct and useful prepositional phrase. It is employed to specify regions or fields of interest, primarily in formal contexts such as news and scientific publications, as indicated by Ludwig. Though "for which areas" is not incorrect, be careful of overusing formal constructions when a simpler preposition would suffice. Alternatives like "in what locations" or "regarding which zones" can provide similar meanings while adjusting the level of formality.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
in what locations
Focuses on specific places rather than broader areas.
regarding which zones
Emphasizes a zoning or regional aspect.
as to which regions
More formal and emphasizes a direction or focus toward specific regions.
concerning what districts
Highlights administrative or political divisions.
with respect to which territories
Formal and emphasizes possession or control.
in relation to which sectors
Focuses on specific industries or fields.
pertaining to which domains
Highlights areas of knowledge or influence.
about what spheres
Emphasizes areas of activity or interest.
in connection with what fields
Focuses on specific areas of study or work.
regarding what localities
Highlights local or neighborhood settings.
FAQs
How can I use "for which areas" in a sentence?
Use "for which areas" to specify particular regions or fields of interest. For example, "We need to identify the specific challenges "for which areas" we should focus our resources."
What are some alternatives to "for which areas"?
You can use alternatives such as "in what locations", "regarding which zones", or "as to which regions", depending on the context and the level of formality required.
Is "for which areas" formal or informal?
"For which areas" is generally considered more formal. In informal contexts, simpler prepositions like "in" or "within" may be more appropriate.
When is it best to use "for which areas" instead of a simpler phrase?
Use "for which areas" when you need to clearly specify a connection or relationship between the areas being discussed and a particular condition or criterion. This is particularly useful in formal or technical writing.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
87%
Authority and reliability
4.1/5
Expert rating
Real-world application tested