ersatz vs strained

ersatz

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

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

strained

adj
  • Not natural or spontaneous but done with effort 

  • Forced through a strainer. 

  • Under tension; tense. 

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