At a recent checkup, I was shocked: Even though I was eating foods rich in saturated fat and a seemingly more indulgent diet, my total cholesterol was down 10 points, my bad LDL cholesterol was stellar, and my good HDL was the highest it's ever been.
As the frequency of the signal to be measured increases to approach the frequency of the source frequency, measurement error increases. To improve the accuracy of the frequency measurement for higher unknown frequency, we can use this second measurement method, count number of pulses in known time.
However, frequency is a precise scientific unit of measurement, while pitch, although defined by its frequency, also has a subjective component that takes into account the relative placement of the frequency within the context of an established tuning system and in relation to other frequencies.