This question had been widely asked in the web and the answers are equally wide though a very few of them only were correct or authentic.
I happen to read in quora that it is a myth that Google insists on certain number of page views of a site to be approved. Google does not ask that data at all.
All Google looks for are:
* A template that offers easy navigation to readers
There is one Vinay kumar Katiyar who claimed to have approved over 1500 AdSense applications had replied in detail to the title question. I followed his profile link and read several of his input in the Internet and to me, he is knowledgeable and is worthy of following.
Read more: https://www.quora.com/How-many-pageviews-should-a-blog-have-to-get-adsense-approval