at ease vs precipitous

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. 

precipitous

adj
  • Headlong 

  • Hasty; rash; quick; sudden 

  • Steep, like a precipice 

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