The limit is 10 forum contributions on a given calendar day (midnight to midnight).

Contributions that go over the per-day limit are recorded in my gradebook but are not posted on Blackboard and are not counted toward your grade.

For example, you missed six classes and decide to make them all up at one sitting by posting 30 forum contributions. When you check the Student Gradebook on Blackboard you find that you only have 10 contributions that actually count. You have to come back on later days to make up the rest.