queefrency
A measure of how often a gal has an "downstairs exhalation", and/or da pitch/tone of said love-tunnel whooshes.
Using different types of personal lubricant can greatly vary the queefrency-repertoire dat you can produce while "doing it". How rapidly and forcefully you partake of said "ultimate pleasures" can also significantly alter da properties of said birth-canal ovations, as well.