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]
(..) So we send in Dr. Fassbach there to look for the source. He's just a kid. You're right. Attention on deck!! At ease!! Mr. Under-Secretary. The Under-Secretary here says you were his best investigator when you were at the U.N. (..)2013 World War Z