The phrase "and even frequently" is correct and usable in written English.
It can be used to emphasize that something occurs often, sometimes more than expected or usual.
Example: "She visits the museum and even frequently attends the special exhibitions they host."
Alternatives: "and often" or "and quite regularly".
Straight from the book of state law in the south, Douglas read aloud those punishments allotted to slaves, then – "lashings on the back, the cropping of ears and other revolting disfigurements" – as now: "for the most venial crimes, and even frequently when no crime whatever had been committed".
Rather than being subsidized by the taxpayers, MPI is a cash cow, and even frequently provides annual rebates on already low premiums to its policyholders.
Ethiopian highlanders rarely show signs of CMS; the disorder appears more frequently in the Tibetans and even more frequently in the Andeans.
Tom Cox in The Daily Telegraph disagreed: he praised the characterisation, calling Mountstuart "a man whose fragile egotism and loose-fitting story has you frequently forgetting you're reading fiction, and even more frequently forgetting you're reading at all".
Second, tRNA gene translocations have occurred more frequently in the lineages leading to morphologically distinguishable congeners and even more frequently among lineages representing different genera (Fig. 3b- c).
"She was vain, arrogant, spiteful, bloody-minded, frequetly un-just and, even more frequently, maddeningly indecisive.
Only occasionally did he venture up to the Lords, and even less frequently did he speak in the chamber.
At first, as new enterprises crowded the Internet, one significant question was hardly ever asked, and even less frequently answered: namely, who would pay for it?
STONES and bones rarely make the front page, and even less frequently in the same month, but this has been no ordinary month.
TOT SIGHTINGS A few times a week in the main dining room and even more frequently in the no-reservations Tavern.
The poll was part of Switzerland's direct democracy system, in which votes are held on a wide range of national issues four times a year and even more frequently at regional and municipal levels.
