Crickets are well known for chirping at a rate that depends on temperature -- some people even use a pet cricket as a thermometer. The snowy tree cricket (Oecanthus fultoni Walker) has been found to chirp according to the formula below.

N = number of chirps per 13.0 seconds = T - 40.0

In this expression, T is the temperature in degrees Fahrenheit. Suppose a snowy cricket is chirping when the temperature is 63.9 degrees Fahrenheit. How many oscillations does the radiation from a cesium-133 atom complete between successive chirps?

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