shaky vs unsteady

shaky

adj
  • Easily shaken; tottering; unsound. 

  • Shaking or trembling. 

  • Wavering; undecided. 

  • Full of shakes or cracks; cracked. 

  • Nervous, anxious. 

unsteady

adj
  • Inconstant in purpose, or volatile in behavior. 

  • Lacking regularity or uniformity. 

  • Not held firmly in position, physically unstable. 

verb
  • To render unsteady, removing balance. 

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