at ease vs shaky

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. 

shaky

adj
  • Easily shaken; tottering; unsound. 

  • Shaking or trembling. 

  • Wavering; undecided. 

  • Full of shakes or cracks; cracked. 

  • Nervous, anxious. 

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