The phrase "a variable frequency of" is correct and usable in written English.
It can be used when discussing the occurrence or rate of something that changes over time or in different conditions.
Example: "The study revealed a variable frequency of symptoms among patients, indicating differing responses to the treatment."
Alternatives: "an inconsistent rate of" or "a fluctuating frequency of".
Headache has been reported as a subtle symptom of the onset of MS, with a variable frequency of 1.6 28.5%; however, it remains unclear whether headache is a true symptom of MS onset.
We observed a variable frequency of NK cells (0.5%-15.6%) that showed degranulation of CD107 in the presence of ALL blasts and this frequency was strongly dependent on the donor.
However, it is unclear whether headache is a symptom of the onset of MS. Kurtzke et al. [9] considered headache as a subtle symptom of MS onset, with a variable frequency of 1.6 28.5%.
Our experimental observations show that a small area of average pitch of 100 lines/mm on the grating having a variable frequency of 59 220 lines/mm over a distance of 75 mm behaves as a lateral-shear interferometer in the same way as any area of pitch of 100 lines/mm on the grating of uniform pitch of 100 lines/mm.
In the present study, direct AdhPrP immunization induced a variable frequency of precursor T cells secreting IFNγ in response to P8 that contains the major CD4+ epitope 155 170 of mPrP [21] [22].
As such, we might expect a variable frequency of the polymorphisms around the world.
The air circulation is reduced with the help of a variable frequency drive (VFD), which results in a significant reduction in the fan power of the CT.
We will, therefore, include a secondary outcome variable, frequency of occasions of binge drinking, self-reported by participants to account for this risky pattern of alcohol consumption that is likely to be endemic in this population.
When seen from a pharmacological perspective, this represents an improvement compared with the CIA model, the current gold-standard arthritis model in the mouse, which has a lower and more variable frequency of disease incidence and a non-synchronized onset [ 38].
Table 5 shows a hierarchical model including as variable frequency of attacks in child.
Our observations on mouse and human amniocytes are generally in agreement with a recent description of efficient but variable frequency of hiPS cell derivation using human amniocytes that were subjected to long-term culture (>10 passages) and morphologic selection after infection, and then grown on mouse feeder cells (34).
