ersatz vs sincere

ersatz

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

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

sincere

adj
  • Genuine; meaning what one says or does; heartfelt. 

  • Meant truly or earnestly. 

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