molar vs wisdom tooth

molar

noun
  • A back tooth having a broad surface used for grinding one's food. 

  • A unit of concentration equal to one mole per litre. 

adj
  • Of, relating to, or being a solution containing one mole of solute per litre of solution. 

  • Of or relating to a complete body of matter as distinct from its molecular or atomic constituents. 

  • Of or relating to the molar teeth, or to grinding. 

wisdom tooth

noun
  • One of the four (one upper and one lower on each side) rearmost molars in humans, which typically develop between ages 18-24. 

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