caoutchouc vs epoxy

caoutchouc

noun
  • latex; natural rubber 

epoxy

noun
  • A thermosetting polyepoxide resin used chiefly in strong adhesives, coatings and laminates; epoxy resin. 

adj
  • Derived from an epoxide. 

verb
  • To glue with epoxy. 

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