The detrusor urinae muscle, also detrusor muscle, muscularis propria of the urinary bladder and (less precise) muscularis propria, is smooth muscle found in the wall of the bladder.
Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency, which emphasizes the contrast to spatial frequency and angular frequency. The period is the duration of time of one cycle in a repeating event, so the period is the reciprocal of the frequency.
A period T is the time needed for one complete cycle of vibration to pass a given point. As the frequency of a wave increases, the period of the wave decreases.Frequency and Period are in a reciprocal relationship that can be expressed mathematically as: Period equals the Total time divided by the Number of cycles. 1  Orbital period is the time for something to go round (orbit) something else.requency and Period are in a reciprocal relationship that can be expressed mathematically as: Period equals the Total time divided by the Number of cycles.