Seth Godin advises bloggers to give their loyal readers a break and post less often. Seth is one of the great minimalists of our times and I admire him for it. But I'm not sure that the number of times you post is at the core of the matter.
I have posted as many as 20 times in a single day on my three blogs. I have also gone a full week without posting once. The driving factor, was not what I thought would or would not please readers. It was whether or not I thought I had something to say that was interesting or useful.