The phrase "at multiples of" is correct and commonly used in written English.
It is typically used when describing numbers or quantities that are multiples of a certain number or quantity. Example: The store sells candy at multiples of 10, so you can buy 10, 20, 30, or 40 pieces at a time.
Previous software deals were clinched at multiples of 4 to 6 times revenue and 7 to 10 times maintenance revenue.
XRD and TEM revealed the presence of mixed intercalated populations with interlayer spacings at multiples of 0.5 nm.
SI source activity showed oscillations at multiples of 20 Hz with characteristic differences in the beta band and the gamma band.
Our London reach will be at multiples of the quality national titles and our London classified business will once again have significant scale".
The Anderberg model introduced in Eurocode 1992-1-2 givestress-strainin relatiofships of reinforcing bars for high temperature values at multiples of 100oC.
In addition, turbulent wind contains energy across a broad frequency spectrum and improvements at multiples of the rotor frequency are less important in these conditions.
The experiments showed pressure pulsations at 50 Hz and at multiples of 50 Hz that were not predicted in the CFD simulation.
At low frequency, the spectrum of measured track vibration has been found to have a distinct pattern; with spectral peaks occurring at multiples of the vehicle passing frequency.
The distinctive sound of each patch is constructed by adding together a series of sine waves at multiples of the note's base frequency, with amplitudes varying as a function of the harmonic.
We then have samples of that and when we sample that and for this particular example, it's sampled at 10 kilohertz this spectrum is then replicated at multiples of the sampling frequency.
Stressing again the reason it relates to the spectra, and the reason is that the original spectra is simply replicated at multiples of the fundamental frequency of the pulse train.
