sturdy vs unsteady

sturdy

adj
  • Resolute, in a good sense; or firm, unyielding quality. 

  • Of firm build; stiff; stout; strong. 

  • Solid in structure or person. 

noun
  • A disease caused by a coenurus infestation in the brain of an animal, especially a sheep or canid; coenurosis. 

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 sturdy and unsteady occurred in a corpus of books? (source: Google Ngram Viewer )