equable vs unsteady

equable

adj
  • Unvarying, calm and steady; constant and uniform. 

  • Not easily disturbed; tranquil. 

  • Free from extremes of heat or cold. 

unsteady

adj
  • Lacking regularity or uniformity. 

  • Inconstant in purpose, or volatile in behavior. 

  • Not held firmly in position, physically unstable. 

verb
  • To render unsteady, removing balance. 

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