The phrase "at a frequency of around" is correct and usable in written English.
It can be used when discussing measurements or occurrences that happen at a specific frequency, often in scientific or technical contexts.
Example: "The device operates at a frequency of around 2.4 GHz, which is common for wireless communication."
Alternatives: "at approximately" or "at a rate of about".
A self-sustained flow oscillation at a frequency of around 1 kHz is found numerically, in good agreement with the unsteady wall pressure measurements.
For all sites except KR03, the site amplification factors have a certain value at a frequency of around 1 Hz; however, the amplification factor for KR03 is clearly smaller.
In the case of our reentry observation, ρ and V s values at observation sites are ∼1500 kg/m3 and ∼300 m/s, respectively, which gives a value of ∼2 at a frequency of around 8 Hz.
Derr et al. observed His+ prototrophic cells at a frequency of around 200 per 109, which could only result from recombination between the HIS3 cDNA and chromosomal his3-∆Msc1 allele [49].
The time course of the signal is then analysed by Fourier decomposition giving images which are weighted by lung perfusion at a frequency of around 1 Hz (the pulse rate) and images which are weighted at a lower frequency (~0.2 Hz) by respiratory motion.
Using the IncA/C reference plasmid pRA1 as helper plasmid, E. coli SGI1-C transconjugants were found at a frequency of around 10−3 (Table 2).
When we re-examined AS frequency in At and Os for this study, we also found a frequency of around 20%.
The song was a repetition of single notes, with a frequency of around 6.4 kilohertz.
For most of the work's duration, twenty-four subwoofers, placed with their cones pointed upward, emit electronic tones that vibrate at a frequency of 10.67 hertz, or around ten oscillations per second.
Heterozygous transgenic Int6sh female FVB/N mice developed tumors at a frequency of 41.7% (10/24) around 18 months of age after giving birth to several (2 4) litters (Table 1).
The composite material has a permeability of 8.46, a loss tangent value of 0.1 at a frequency of 30 MHz and saturates around 0.13 Tesla.
