If you vape once an hour thats not a lot, at,least from my experience and many others. I vape pretty much all day when my eyes are open. I think the nicotine in ejuice isn't as efficient entering the blood stream as cigarettes are. If you hit a cigarette the nicotine enters the blood stream almost immediately and you can feel it. I think vaping is more of a gradual process so you have to vape more to maintain a nic level that your body finds satisfying. If you want to really stop cigarettes I think vaping more often and maybe with a higher percentage of nicotine might be beneficial.
Tu illustrate this theory. I smoked PAD regular strength cigarettes, and switched to 24mg juice, going through about 4ml per day. After a few months, I was trying to DYI something close to cigarette taste for my wife. To compare the taste, I bummed an analog from a friend. About 1/4 through the (disgusting) smoke, I had to stop due to the dizzy sensation of nic coma
4ml of 24mg juice is 3-4x more nicotine than a pack of regular tobacco, but, seemingly, less of it gets absorbed