You should post a blog as often as you can while still maintaining quality. In other words, consistency is far more important than frequency. So, stick to a content posting schedule that works for your brand and target audience.
According to HubSpot, companies that published 16+ blog posts per month got almost 3.5X more traffic than companies that published between 0 - 4 monthly posts. If your business doesn't have the bandwidth or isn't in a market where that frequency makes sense, then just post as often as you can consistency.
Ever blog post should entertain or provide insight, creating noise just to hit high numbers is a plan that will backfire.
For a complete content strategy that includes blogging, Contact On-Target!