The phrase "a concern on a" is not correct in standard written English.
It is typically used incorrectly; the correct preposition should be "about" or "regarding" instead of "on."
Example: "There is a concern about a lack of resources for the project."
Alternatives: "a concern regarding" or "a concern about".
Battery life was also a concern on a device so small, and engineers mulled over how the watch's power should be replenished.
Unruly hair is often a concern on a wedding day, but especially so for Maggie and Jonny Eskander, who at the end of May arrived at their reception at the Doral resort in Miami by helicopter.
Group I exposures would have been identified as a concern on a chemical-by-chemical basis.
Its 200-plus mile range can be a concern on a long drive if a charging station isn't nearby.
Too often we hear of patients not having the confidence to raise a concern on a hospital ward.
Writing in the BBC News website's Scrubbing Up column, ombudsman Dame Julie Mellor said: "Too often we hear of patients not having the confidence to raise a concern on a hospital ward".
The economy is booming, the United States is pre-eminent in the world, abortion appears to have receded a bit as a concern on both left and right.
Insider trading is illegal generally, but Congress's apparent exception from the ban was never a concern on Capitol Hill until a recent report on "60 Minutes" questioned whether various members were profiting from back-room knowledge.
Also, there is a concern on finding the reliability value of an IDS.
Never a concern on his face.
The paradoxical result is a contracting market, and a concern on the part of the company that they will not make sufficient profit during the lifetime of the patent exclusivity to recoup their investments and fuel new discovery.
