He delighted people with his charm and 'ease' of manner. [=his relaxed and easy manner]
The students might respond better if the teacher 'eased up on' them a little.
These features can be modified 'with the greatest of ease'. [=very easily]
(..) -I don't get it. You uncultured swine! What're you lookin' at, ya hockey puck? -Hey, Sarge, have you seen Slinky? -Sir! No, sir! Okay. Hey, thank you. At ease. Hey, uh, Slinky? Right here, Woody. I'm red this time. -No. Slink... -Oh, well, all right. (..)1995 Toy Story