"uneven proportion" is a correct and usable phrase in written English.
You can use it to refer to when two or more quantities or qualities do not have a balanced or equal distribution. For example: "The uneven proportion of resources between the two countries caused unrest in the region."
The event's uneven proportions give the awkward impression of professional tennis players who stumbled upon a tea-set-sized court, shrugged, and said, "Let's do this".
Simulation dataset 2 comprises 850 K reads, mixed at uneven proportions from three mammalian species (cattle, pig, sheep) and the bacterium E. coli (Table 2).
One of the most difficult tasks for infants is to hold their bodies up against gravity due to uneven body proportions [ 19, 20].
We did not include smoking status in the children and adolescents model because of the small proportion and uneven distribution of smokers among these two groups.
Yet, Ms. Prada and her team of assistants have a knack for stepping back and deciding what looks modern -- bare, wind-chafed legs, the unexpected coyness of a lavender pansy print on a creamy chiffon or organdy dress, slightly jarring proportions and uneven hemlines, including some with a trace of chiffon hanging down, like a slip or a loose lining.
However, the overall effects on carbon benefit estimation are somewhat reduced by the uneven distribution of area proportions between protected and unprotected forestlands.
His work is uneven in quality, and the proportion of good poetry is small.
The distribution is uneven and commensurate with the proportion of the areas of operation in the sample.
Secondly, the highly uneven read coverage and an increased proportion of chimeric reads can be caused by the MDA procedure.
Caution is needed when covariates have very uneven splits with only a small proportion of cases in one group, e.g. pre-operative RT, as this can lead to very unstable regression estimates and SEs when performing a CC analysis.
