When you think about recommended blogging frequency, you should consider three perspectives:
1. how often would the search engines prefer for me to post in order to achieve my goals?
2. how often would my subscribers like to read blog articles from me?
3. how is my scheduled blogging frequency meeting my goals?
If you want to make a career out of blogging, then publishing every day or several times in a day is fine. If you have a business to take care of and time is very important for you, then I recommend to adjust your blogging frequency by the type of business you are promoting.