Your number of 0.32% could maybe be defined as "short-term speed deviation" .... with "short-term" being defined by the Fluke meter's ballistics on the short limit and how long you looked at it as the long limit.
But wow & flutter is measured very differently: the test tone is applied to an FM discriminator (similar to the circuit that demodulates the audio in an FM tuner), and the reading is taken from its output. And in order to have any correlation with anybody else's numbers, very specific filters are applied to the signal before the discriminator as well as the discriminator's output, and the meter's ballistics (i.e. peak or averaging) have to be carefully defined.
But wow & flutter is measured very differently: the test tone is applied to an FM discriminator (similar to the circuit that demodulates the audio in an FM tuner), and the reading is taken from its output. And in order to have any correlation with anybody else's numbers, very specific filters are applied to the signal before the discriminator as well as the discriminator's output, and the meter's ballistics (i.e. peak or averaging) have to be carefully defined.