The phrase "and increase in the frequency of" is correct and usable in written English.
It can be used when discussing a rise or growth in how often something occurs or is observed.
Example: "The study revealed a significant and increase in the frequency of extreme weather events over the past decade."
Alternatives: "and rise in the occurrence of" or "and growth in the rate of".
Future warmer temperatures and increase in the frequency of dry spells and abundant biomass accumulation can enhance the fire risk on the one hand, but will probably promote the expansion of broadleaf deciduous forests to higher latitudes, on the other hand.
Given the impact to patient outcome, improvements in these two parameters were more significant than the corresponding reduction in the frequency of true negatives and increase in the frequency of false positive measurements.
Correspondingly, the decrease in mtDNA stability and increase in the frequency of point mutations were more pronounced in the yeast strain carrying the Arg770Glu variant than in the one with the Val863Ala allele.
It was shown that Smad7 expression is absent in T cells from multiple sclerosis patients with a stable disease course and increase in the frequency of peripheral regulatory T cells (Correale and Farez, 2007).
Additionally, the appearance and increase in the frequency of gene duplications and deletions in large adaptive recovery populations is unlikely to be a direct consequence of the msh-2 treatment during mutation accumulation.
In the latter instance we observed and increase in the frequency of both mEPSCs and mIPSCs indicating that both excitatory and inhibitory synaptic inputs are changed in control mice, but not DAT-NR1 KO mice.
But in two of the adult chimps, there was just an overwhelming increase in the frequency of yawning".
The shift resulted in a dramatic increase in the frequency of drone attacks in Pakistan.
The increase in the frequency of overshooting tended to increase with increasing size of the outliers.
He says studies predict significant increases in the frequencies of some extreme weather events, but not all.
Watson said increased player movement, via free agency and trades, has increased the frequency of fraternization.
