The phrase "a frequency equal to or" is correct and usable in written English.
It can be used in contexts involving measurements, comparisons, or specifications, particularly in scientific or technical writing.
Example: "The device operates at a frequency equal to or greater than 2.4 GHz."
Alternatives: "a frequency that is at least" or "a frequency of no less than".
A frequency equal to or greater than 25 (Hz) is regarded as real-time [24, 25].
In this approach, responses with a frequency equal to or above 5 prevailed, and some of the 'very rarely' and 'rarely' options of the Planning, Organization and Control constructs remained without frequency scores.
TMS at a frequency equal to or below 1 Hz has the effect of depressing cortical excitability for a short period of time after each pulse [34].
The null hypothesis that a haplotype carrying four or more D alleles could achieve a frequency equal to or higher than the observed H56 frequency in each of the AF, GE, US and JP populations under neutral evolution was tested (Table S4).
Once again, we put forward herein and below the narrow designation for "a founder lineage" as being present in the sample of the contemporary community at a frequency equal to or greater than 5%, based upon the complete mtDNA genomic sequence for that lineage.
Network anti-motifs meet the following criteria, as defined here: (i) The probability that the anti-motif appears in a real network in a frequency equal to or greater than the number of times it appears in the randomised network is less than p = 0.01.
The excitation is set at a frequency equal to that of a natural frequency of the non-rotating shell.
At a frequency equal to the parameter omega sub c, up here, which is referred to as the cutoff frequency, the Butterworth filter frequency response always goes through the same point, namely 0.707.
The source of the voltage is an oscillator similar to a radio transmitter that operates at a frequency equal to the frequency of revolution of the particles in the magnetic field.
The cracked rotor is excited axially using an electrodynamic exciter at a frequency equal to its bending natural frequency in both non-rotating and rotating conditions.
In these conditions, the light sources appear to oscillate in space at a frequency equal to the difference between the vibration and flicker frequencies.
