Hard to say? There's a distinction between several different types of orgasm I have. I've identified three:
The first are the ones leading up to the big payday. These are soft convulsing ones that send tiny shock waves of spasm throughout my vagina/clit/nipples. They seem to have a lot to do with getting me wet and can last for several minutes at a time.
The second are the big ones and have me loose all control. I have major contraction and super intense sensation of utter fucking bliss that has me screaming full volume into a pillow (or to the neighbors), wrapping my legs and arms around my boyfriend in a death grip and clawing his back (I've also been know to bite), as my body is possessed by some demon of lust and I'm at the mercy of it. Letting go and having these can be really scary at times because I feel I'm stand on the edge of cliff about to jump off. These usually last for 30-45 seconds (of maddening pleasure) and then tapper off into the 3rd type of orgasm ...
The last can be tricky as my clit is super sensitive at this point and an aggressive rub from my partner can ruin it. Basically if I continue with intercourse I feel these warm waves of pleasure build and then roll over me. If I ride it just right I can immediately have a second (#2) larger orgasm within minutes. It took a little practice and I wasn't always able to do that. Now I've got it down to were I can ride these waves of pleasure from one orgasm to the next, sometimes with each orgasm becoming more intense than the last.
On good night I've counted anywhere from 5-10 #2's. I couldn't tell you how many of the pre and post orgasms I have because they're continuous once they start. I don't even know if I'd call them actual orgasm as comparatively speaking they are no where near the full blown ones. Instead there's an enormous amount of satisfaction in these longer ones that are broken up with tiny orgasms (for lack of a better word) with soft spasms drenched in sweet endorphin bliss that make me really wet.