How often should you post on Facebook?
You should ideally be posting on Facebook once per day, this is an optimum amount to keep the engagement with your audience. More than twice a day and you run the risk of beginning to irritate people. As a minimum you should post once a week but you may find it difficult to keep the momentum going with your audience
How often should you post on Twitter?
A good average figure used by many brands is 3 times per day. It depends on your business of course so test it and see how much engagement you get
How often should you post on LinkedIn
LinkedIn has stated that its own research shows that posting around 20 times per month will allow you to reach over 60% of your audience