Feel free to post these in whichever order you would like. I find that posting them in the below allotted time slots has worked best in the group I manage:

8AM

11AM

2PM

5PM

8PM

Also make sure to not post them exactly on the dot of the hour. It will look less planned out if you give them anywhere from 10 minutes before to 10 minutes after the hour. For example: The good morning posts can be posted anywhere from 7:50AM-8:10AM for prime engagement.