ersatz vs impaired

ersatz

adj
  • Made in imitation; artificial, especially of a poor quality. 

noun
  • Something made in imitation; an effigy or substitute. 

impaired

adj
  • Rendered less effective. 

  • inebriated, drunk. 

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

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