The answer to this question depends on the type of blog you have and what you hope to achieve. If your blog is a personal blog, then you should post every day. If your blog is a business blog, then you may only need to post once or twice per week. The goal is to keep your readership engaged, so posting regularly is key.
However, if you find that you are posting too frequently, then consider cutting back on the frequency to once or twice a week. Ultimately, the goal is to create a healthy balance between posting and promoting your content so that readers stay interested and coming back for more.