This is a very rational way to use Facebook. Make yourself the master of it, and get value from the tool on your own terms.
Once a day (e.g. 15 minutes) use probably gives a person 80% of the utility or value of 20x a day (e.g. 2 hours) usage. There is relatively little benefit from all those "extra visits", since almost nothing on Facebook is urgent, actionable, or going to cost money if not attended to immediately. (A great example of the 80-20 rule in action, btw.)
Once a day (e.g. 15 minutes) use probably gives a person 80% of the utility or value of 20x a day (e.g. 2 hours) usage. There is relatively little benefit from all those "extra visits", since almost nothing on Facebook is urgent, actionable, or going to cost money if not attended to immediately. (A great example of the 80-20 rule in action, btw.)