The phrase "about the same frequency" is correct and usable in written English.
It can be used when comparing the occurrence or rate of two or more events or phenomena that are similar in terms of how often they happen.
Example: "The two radio stations operate at about the same frequency, making it difficult to tune into one without interference from the other."
Alternatives: "roughly the same rate" or "approximately the same occurrence".
These vibrations cancel or absorb those present in the exhaust stream of about the same frequency.
Mr. Gore's aides said his advertisement would run with about the same frequency in the same markets as the Bush spot.
There are several variants of the gene, a dominant "taster" type and a recessive "nontaster" type, which occur with about the same frequency.
Some explanations appeal to the suggestion that because the vibrations occur at specific frequencies (around 7 Hz), then they may interfere with patterns of brain activity called alpha waves, which occur at about the same frequency.
These courts are sympathetic to government lawyers, rejecting petitions with about the same frequency that Mets hitters knock in a run; from 1978 to 2012, the courts turned down 11 of 34,000 requests.
You see celery braised with about the same frequency as you see braised leeks, which is to say now and then at a French restaurant that's striving to be traditional.
Psychosomatic symptoms (headache, abdominal pain, depressive mood, day tiredness, difficulties in falling asleep, waking up during nights) were asked about with the same frequency categorization as for musculoskeletal pain.
These symptoms, which we collectively refer to as "psychosomatic", were asked about with the same frequency categorization as musculoskeletal pain, and each of them was considered positive if it had been present at least once per week during the preceding 3 months.
Why hasn't Letterman cracked consistent jokes about Roethlisberger with the same frequency as he did with Tiger?
As seen in the media files, the polystyrene beads follow the propelling beam at the same frequency (about 0.1Hz).
At first I felt guilty about not being able to maintain the same frequency of communication with my friends.
