The phrase 'trivial proportion' is a correct and usable expression in written English.
It is an idiom which is used to describe a very small amount of something in comparison to the whole. For example: "The number of people who responded positively to the survey was a trivial proportion of the total number of people who were invited to participate."
However, this is a trivial proportion.
Information on species richness, for example, would have been needed to appreciate if the 40 species recorded as medicinal plants form a significant or trivial proportion of the complete species set.
Although the effect of sexual orientation on homophobia is large at the individual level, the percentage of non-heterosexuals is so low, it accounts for only a trivial proportion of population variance in attitudes to homosexuality.
Direct evidence that childhood ALL has a genetic component is provided by the high risk of developing the disease associated with certain inherited cancer-predisposing syndromes such as Bloom's syndrome, Down syndrome, Fanconi anemia, neurofibromatosis and ataxia telangiectasia, however they account for a trivial proportion of cases (collectively <5%%) [ 2].
"There is a non-trivial proportion of facilities that are called maternity units but don't have running water, don't have electricity, don't have trained providers".
The National Occupant Protection Use Survey and studies in California, Maryland, and New York show a non-trivial proportion of motorcyclists using non-compliant helmets [9, 16, 22, 28].
The data presented here shows that a non-trivial proportion of the nominalization tokens in our data have no arguments at all, and that some nominalizations lack arguments more often than not.
We identified a non-trivial proportion of these as disease resistance genes.
Data processing contributes a non-trivial proportion to total research costs, but documentation of these costs is rare.
Imprecise diagnostic registration probably explains the non-trivial proportion of vaguely defined cancers observed in our study (16%).
It is much more difficult when, as we found, a non-trivial proportion of people approached refuses to participate.
