resin vs tooth enamel

resin

noun
  • Any synthetic compound of similar properties. 

  • Any of various yellowish viscous liquids or soft solids of plant origin; used in lacquers, varnishes and many other applications; chemically they are mostly hydrocarbons, often polycyclic. 

  • A viscous hydrocarbon secretion of many plants, particularly coniferous trees. 

verb
  • To apply resin to. 

tooth enamel

noun
  • The hard, mineralised substance that makes up the visible part of teeth. 

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