The phrase "mostly prevalent" is correct and usable in written English.
You can use it when referring to something that is predominant over all other things. For example: "In this town, shotguns are mostly prevalent as a form of home defense."
The racial part of the debate stems from the fact that crack is mostly prevalent in African-American communities and that the powdered form is typically used by white Americans.
Merbau wood, mostly prevalent in Papua's virgin forests, has been illegally logged and shipped to China since the late 1990's, stripping large swathes of forest in the Indonesian province on the western side of the island of New Guinea.
These circumstances are mostly prevalent in battlefield operations, where each person uses wireless device having limited battery power and each missile vehicle are wireless enabled with higher power reserve.
Serum 25(OH D ELISA revealed that cases were vitamin D insufficient (Median = 12.16 ng/ml, 95% CI: 3.84 22.22) and controls were vitamin D sufficient (Median = 30.22 ng/ml, 95% CI: 20.08 46.78; p < 0.0001) respectively, which indicated that vitamin D insufficiency was mostly prevalent in cases.
These are mostly prevalent on the western half of the lake complex.
In addition, the Koreans present moderate frequencies of (sub haplogroup A (8.1%) and (sub haplogroup G (10.3%) lineages, mostly prevalent in northeast Asia and southeast Siberia [20], [55] [57].
The genre was prevalent mostly in American crime dramas of the post-World War II era.
Susan's great-grandparents, Mansueto and Angelina, had endured the loss of six children, mostly to diseases prevalent among the poor.
And, because FGM is prevalent mostly in places where health infrastructure is weak or non-existent, the intervention is often unsanitary and ultimately can be deadly.
There is a large body of literature suggesting that knee injury leads to an increased risk of OA (mostly incident or prevalent OA) [ 7- 17].
Indeed, in the period 4 to 5 years after the start, women aged 50 to 54 years were mostly new entries (prevalent screening).
