I used to smoke 10 - 20 rollies a day which is about 10 drags per cigarette. That means I'd puff about 100 - 200 times a day. I worked out I now puff around 500 times a day on my
ecig. It's normal to use an
ecig more often than a cigarette.
The only factor that's important is the amount of liquid you use in a day because that will give you your nicotine amount potentially absorbed. Since we all use different equipment, we can't equate puffs to volume delivered and therefore nicotine absorbed.
Here's everyone's average ml used a day:
I wouldn't worry about it as long as you have no adverse symptoms.