at ease vs nervy

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. 

nervy

adj
  • jittery; having unwanted signal characteristics. 

  • Having nerve; bold; brazen. 

  • Feeling nervous, anxious or agitated. 

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