at ease vs collected

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. 

collected

adj
  • Cool‐headed, emotionally stable, in focus. 

  • Gathered together. 

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