A previous g/f used to have 7 or more each time. Each would last about 30 seconds and the next would come in about 60 to 90 seconds. Each would be more intense than the one before up to about number 7, then they would taper off in intensity. After the first two she would ask me to bring them on manually, mostly by G spot pressure. Only after she was fully satisfied would she satisfy me.
Interestingly she was polynesian and I have found these gals to be more intense and excitable.
Sexologist