The phrase "are sufficiently frequent" is correct and usable in written English.
You can use it to describe occurrences or events that happen often enough to meet a certain standard or requirement.
Example: "The data shows that these incidents are sufficiently frequent to warrant further investigation."
Alternatives: "occur often enough" or "happen with adequate frequency".
GWAS can be a powerful tool for identifying such alleles, as long as they are sufficiently frequent in the population, and several recent reports have demonstrated the potential of this approach for A. thaliana6,7,8,9,47.
In contrast, BRCA1 mutations are sufficiently frequent in families with both breast and ovarian cancer, or at least 4 cases of breast cancer (at any age), that genotyping might be considered.
ii) QSS is highly reproducible if genetic variants are sufficiently frequent in the population (above 5%), as the standard deviation among numerous repeats was very small.
Where attacks are sufficiently frequent to justify daily medication, anti-migraine prophylaxis (e.g. cyproheptadine, pizotifen, amitriptyline or propranolol) might help prevent episodes.
Mental disorders are sufficiently frequent in this clinical group to suggest that case-finding measures, for example the routine administration of rating scales, may be useful strategies.
However, 2-hour sampling was nearly identical to the 1-hour curve, suggesting that 2-hour intervals are sufficiently frequent to accurately describe population-level changes in mRNA abundance.
Wild-type V. cholerae can outcompete the constitutive biofilm producers and non-producers if habitat turnover is sufficiently frequent.
Watching the 20th debate on Wednesday night, I realized that these forums had begun long enough ago, and been sufficiently frequent and taxing, that the surviving participants were looking or acting appreciably older; Gingrich with more jowl, Romney with more crease, Ron Paul with more stammer.
To serve the latter purpose, they must be sufficiently frequent, and the penalties for fraud must be sufficiently strict, that they serve as a deterrent to false subsidy claims.
"I do not believe that rolling productions every 60 days is sufficiently frequent to enable the public to engage in fully informed discussion about Secretary Clinton's leadership style and decisions while at the helm of the State Department," was James' official response.
Note that for species sorting to occur, dispersal must be sufficiently frequent so that species suitable for certain habitats are able to colonize these habitats.
