Anybody who wants to know more about the contentpublication. Exact words from SFDC.
"It’s a rolling limit. Imagine you insert 1,000 file at 12:00 one day, and do nothing else for 24 hours. You’ve consumed 1,000 of your 10,000 limit. That level of consumption will remain until 12:01 the next day, at which point the limit drops back down to 0. Now imagine you insert 1,000 files at 12:00 one day, and another 1,000 at 18:00 later that day. You’ve now consumed 2,000 of your 10,000 limit. At 12:01 the next day, your limit will drop down to 1,000 / 10,000, and after 18:01 it will reduce back down to zero. In short, we continuously look back at the number consumed in the last 24th hour, reduce it from the limit, and then add in the number made within the most recent minute."