The answer to this question depends on how often you would like to publish blog posts, and what your goals are. If you only have time to write once a week, then it is probably not worth it to spend the time writing each post. However, if you have more time and would like to write more often, then it is recommended that you write at least once a day. Writing more frequently will help you to better connect with your audience and keep them updated on your latest posts.
Additionally, it will also help you to develop a stronger following for your blog. The concluding statement is that it is ultimately up to the individual writer to decide how often they should write blog posts.