The phrase "a level of concentration" is correct and usable in written English.
It can be used when discussing the degree or intensity of focus or attention someone has while performing a task or activity.
Example: "To excel in this exam, you need to maintain a high level of concentration throughout your study sessions."
Alternatives: "a degree of focus" or "an amount of attention".
Humans seem to be born with an innate ability to concentrate on electronic devices but high school demands a level of concentration on the written word that can be challenging for a 14-year-old.
Yet that hardly conveys a level of concentration that probably wouldn't feel out of place at Livermore lab.
Yet I can't read poetry on public transport, because it requires a level of concentration that I just don't have in such an unpredictable environment.
This is a crime novel that requires a level of concentration and engagement with international politics some readers may balk at.
But for the moment, she was readying her lantern, absorbed with a level of concentration impressive for her four years.
For their part, diners were asked to assemble their own plates, selecting side dishes and, initially, even sauces, a procedure that forced a level of concentration that not everyone was up to.
The second standard would establish a level of market concentration, measured by different economic factors, below which a company would be exempt from any restriction on cable ownership.
This is a level of wealth concentration not seen in living memory – it was last at comparable levels during the roaring 20s – and it's accompanied by regular workers taking ever-smaller slices of the pie.
Climate models suggest that we are dangerously close to a global tipping point, a level of greenhouse concentration in the atmosphere that will produce catastrophic amounts of climate change, but our fate is not sealed.
Reproducibility of the PCR Leishmania test was 100% at a level of DNA concentration corresponding to 0.1 parasites/ml, which was considered the threshold for positive samples.
Those bloody Scandinavians ReprintsThat may already appear a worrying level of concentration, with a risk of tacit collusion or at least "soft competition" on price.
