The frequency of an Earth year refers to the number of oscillations or cycles that occur in one year. To calculate this frequency, we can use the formula:

Frequency (in Hertz) = 1 / Period (in seconds)

The period is the time it takes for one complete cycle. In the case of an Earth year, the period is approximately 31,557,600 seconds (taking an average year of 365.25 days).

Using the formula, we can calculate the frequency as follows:

Frequency = 1 / 31,557,600 seconds ≈ 3.16880878E−8Hz

Therefore, the frequency of an Earth year is approximately 3.17 x 10^−8 Hertz which, as a real number is, 0.0000000317 Hertz. It is also “three hundred seventeen ten-billionths Hertz” in word form.