at ease vs chagrined

at ease

prep
  • Allowed to refrain from being in rigid formation. 

  • Free of anxiety; not stressed or tense. 

  • In a relaxed position with the feet apart rather than at attention. 

chagrined

adj
  • Feeling chagrin (at something); vexed; fretful. 

How often have the words at ease and chagrined occurred in a corpus of books? (source: Google Ngram Viewer )