Instead of requiring me to schedule a specific time for my post to go live, allow me to set a posting schedule (e.g., 9:05am and 4:47pm).
Then, I can add posts to a rotating queue and as soon as the next post time arrives, the next post in the queue will be published. When the end of the queue is reached, the rotation restarts.
Over time, as I add more content to the queue, the time between reposts gets longer and longer.
If I intentionally schedule a specific "post once" post to go up near 9:05 am tomorrow, the queue is paused until the next posting slot.