feeble vs impaired

feeble

adj
  • Lacking force, vigor, or effectiveness in action or expression; faint. 

  • Deficient in physical strength. 

impaired

adj
  • Rendered less effective. 

  • inebriated, drunk. 

noun
  • A criminal charge for driving a vehicle while impaired. 

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