This is a tough one! There are so many different schools of thought on how many times per day you should publish new content. The truth is there is no one-size-fits-all answer.
It all depends on the number of fans you have, their demographics, and habits. However, most guides recommend posting five to ten times per week.
There is one thing for sure; a successful Business Facebook page is built on regular content updates. We do know that Facebook’s algorithms reward your consistency with increased reach. To ensure your audience is seeing your content you need to be publishing fresh, compelling content on a consistent basis.
A sound rule of thumb is to post whenever you have content you think your audience would respond to. Have fun with it and the consistency will come along naturally.