So if there's something important to get across, you're safest having your character SAY it. As a sidelight here, those same studies show that scanners pick up most information from the beginning of a paragraph, next the end of the paragraph, and last the middle. People repeat for emphasis and when they are under a strong emotion. I will not have you running through the fields. The formality also adds emphasis.
People talk in rhythms that are as individual as facial expressions.
These rhythms tell a great deal about the person. Can indicate national origin, ethnicity, regional origin. I'm sure there are more. In interviewing it's pretty obvious who to listen to. First, try eavesdropping.