1) Is it physically possible for a woman to have 70 orgasms in one day or is that literary license?
...there is no way I could keep that up for say (70 divided by 6 = 11 more sessions like that. Times 20 minutes. 11 x 20=220 minutes divided by 60, carry the 1. ) 3 hours 41 minutes of stimulation. Things start getting sore or uncomfortable after a time.
70 is a lot, an unreasonable number there, but let's run the equation top-down. Assuming 24 hours, that's an O every 20 minutes on average. Which sounds exhausting, and also begs the question of "How?" Senisitivity also starts to drop-off after a while, the nerve endings just get saturated, and numb. Which would probably mean a slow steady escalation in the stimuli, and some way to cleanse the nerve endings of neurotransmitters. (I'm not sure how I would go about that, either. Not a neurochemist.)
So, basically still impossibly high, even under prefect conditions. A woman on a hair trigger, multiple (Overlapping) climaxes, and some form of stimulation that doesn't leave her raw. Just for comparison, the record I've seen was 9. Total orgasms, it took about 5 hours, and she passed out for about 36 after that (Assuming she has to be Conscious to actually experience all 70) Even then, she said that the climaxes became progressively less intense, to the point that she could barely feel them, and this was with BDSM. (3 masters, tagging out)
Just going for the long answer here, and checking your work. The answer is still a resounding no.