The phrase "a considerable variation among" is correct and usable in written English.
It can be used when discussing differences or discrepancies within a group or category.
Example: "There is a considerable variation among the test scores of the students in the class."
Alternatives: "a significant difference among" or "a notable disparity among".
In average, we found a 27% of elements in clusters, although a considerable variation occurs among different categories.
A considerable variation in lifetimes among mitochondria of different morphologies and within single cells was evident, corresponding to high physiological variations within single cells.
Despite being generally sensitive to disturbance oribatid mites show a considerable variation in sensitivity among taxonomic groups [12] from taxa common in cultivated soils and heavily disturbed habitats like Tectocepheidae and Oppiidae [13] to very sensitive taxa with long life-cycle and low fecundity like Enarthronota [12].
There is a considerable variation in transfer practices among centers and countries, which may explain the differences in outcomes observed in different studies.
However, genetic regulation accounts for a considerable variation in MBL concentration among individuals.
In addition, there is a considerable variation in telomere length among individuals at birth and afterward [ 10].
Besides, the findings of an empirical study using administrative data showed a considerable variation in medical patterns among some Italian primary care providers organised on a team-based model [ 7].
There is a considerable variation in vacuolating activities among strains [ 9- 11] due to the sequence heterogeneity at the middle (m) and the signal (s) regions within the vacA gene.
This reductive trend in mt genome evolution has continued even after the diversification of the major eukaryotic lineages, yielding a considerable variation in gene content among mt genomes of closely related species (e.g., red algae; Hancock et al. 2010).
