I have been blogging since 2008 on my blog 'getmoneyrich'
In my initial days I used to blog 4/5 posts /month.
But I soon realized the increasing blogging frequency was also important to keep google bots interested in my domain.
I try for daily updates but it is not easy.
I am able to maintain 3/4 post each week. I am doing this since last 2 years.