The phrase "concentration by" is correct and can be used in written English
It is used to indicate that somebody has a long-term focus or is concentrating intensely on a specific task or goal. Example: Michael worked with concentration by, and he was able to finish his project on time.
And each is dense, requiring intense concentration by the audience as well as the actors.
Hurdle told Helton last season that the best hitters maintain their concentration by never taking their eyes off the pitcher.
They require more concentration by the driver and tie up one hand that ought to be on the steering wheel.
Zarutsky, they said, obtained the acid at an auto-body shop and then increased the concentration by boiling it down.
53 min: Another lapse in concentration by Manchester United's defenders almost lets Kapetanos in for a second.
It marks the increasing concentration by AvalonBay Communities Inc., the development and management company, on the high-rise market.
She struggles not to lose hope and keeps up her concentration by learning to weave, giving French lessons, reading her Bible and dictionary, and exercising.
He is against pianists who express concentration by leaning their heads back with their eyes closed: "When you give a recital, God doesn't help you".
After sinking the putt, DiMarco angrily turned and asked security officials to remove the fan, but DiMarco showed concentration by making the putt anyway.
The three-hour opera's French and English surtitles were followed with rapt concentration by an audience used to concerts lasting an hour.
As portrayed with rapturous concentration by Mr. Rogers, whose body seems rhythmically linked to unheard cosmic melodies, Langley is an enchanted prisoner of infinitesimal details.
