On Peacekeeper, you can schedule a post as a repeating post. Doing this will result in the post being posted on the schedule you've set it on. For more information on how to do this, refer to this article.

Repeating posts on Peacekeeper are relatively simple at their core. It works, by automatically re-scheduling an exact copy of the post, right after the first/previous post is posted. This makes it really easy to stop a repeating post.