ersatz vs experimental

ersatz

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

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

experimental

adj
  • Serving to be experimented upon; used in an experiment. 

  • Pertaining to or founded on experiment. 

  • Experiential, empirical. 

  • Serving as an experiment; serving to experiment. 

noun
  • The subject of an experiment. 

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