For example, if the most recent post was made on the evening of Day 3, the next post could be the morning of Day 4 (unless the last post was backdated).
If the last post was made on Day 4 with no specific time of day, the next post could also be Day 4 (at any time of day or no time specified) or go ahead to Day.
That said, while posts should follow a linear timeline where possible, there is no official ICOC ratio.
(whoops, that's IC: OOC ratio!)
We're flexible, and posts may take place at the same time as a previous post, and backdating as needed is fine as long as it is marked as such. There is no set pace to follow.
Hopefully this clears up any last confusion about the how posts are dated in the game and the IC : OOC ratio!