shaky vs tremulous

shaky

adj
  • Shaking or trembling. 

  • Easily shaken; tottering; unsound. 

  • Wavering; undecided. 

  • Full of shakes or cracks; cracked. 

  • Nervous, anxious. 

tremulous

adj
  • Trembling, quivering, or shaking. 

  • Timid, hesitant; lacking confidence. 

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