The phrase "are fairly often" is correct and usable in written English.
It can be used to describe the frequency of an occurrence, indicating that something happens with moderate regularity.
Example: "These types of errors are fairly often seen in the reports submitted by the team."
Alternatives: "occur quite frequently" or "happen relatively often."
Mr. Perry was fairly often named as a second-place choice in a Des Moines Register poll released on Saturday.
Cage whispers, rants and becomes literally incandescent, turning into a blazing skeleton when aroused, which is fairly often.
He replaces him in left field, pinch-runs for him in the late innings and gives him a day off when necessary, which is fairly often.
They met again ("I was fairly often on hand, or underfoot") and, over 18 sittings, Giacometti painted Lord, as described in his A Giacometti Portrait (1965).
There was a whole book of little bylaws that my mother would flip through every now and then, and read aloud from when she was in a mocking mood, which was fairly often.
He started adding those carrots to the potatoes he used when he made vichyssoise for supper — which was fairly often, because by then he was also flying to San Francisco for Dean & DeLuca and coming home with five or six varieties of gourmet potatoes that most native New Yorkers had never even heard of.
Hexagonal pyramid formation over the entire area of the sample had different height and upper platform area due to the uneven flow of sorption particles on the crystal surface; however, their coincidence was fairly often observed (as shown in the Fig. 2e).
Every time I go to a conference or speak at an event -- which is fairly often -- I take the UberBlack car.
Another study demonstrated that the most frequent responses to OHIP-14 were "fairly often" and "very often", for both the relaxation dimension and the embarrassment felt by patients with periodontal disease [ 8].
The number of SNPs with detected errors was also considerably higher in family 1 than family 2. In contrast, in these data, null alleles should be fairly often seen in both families and be found at similar frequencies in the two families, because they share a grandfather and grandmother and the other grandmothers are from the same line.
