The best way to answer this question is to look at your own engagement metrics. Is your content getting traction (pin saves, pin clicks, and outbound clicks) on Pinterest? If so, you can increase the amount of content you create each day to help you grow your audience and reach.
However, be careful not to jump in too quickly and start pumping out a ton of content all at once. Pinterest has a spam filter that can flag accounts that seem to be sharing too much duplicate content, which may hurt your distribution and make your account harder to find. Instead, slowly work your way up to a pinning rate of 15-25 pins a day over a couple months.
What Counts As A Duplicate Pin?
While it used to be common for brands to repin their own content over and over, Pinterest is now giving priority to fresh content. A new image + an old URL (blog post, product, etc) counts as a fresh Pin and will be distributed to the Pinterest audience more often than a repin of an existing Pin.
How Often Should I Pin Per Week If I Only Write 1 Blog Post A Week?
The key to finding your optimal pinning frequency is understanding when your ideal and existing audiences are most active on Pinterest. Using that knowledge to schedule Pins at the best times for your specific audience can increase your chances of them seeing and engaging with them.