molar vs submarine

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. 

submarine

noun
  • A kind of sandwich made in a long loaf of bread. 

  • Any submarine plant or animal. 

  • A boat that can go underwater. 

  • A pitch delivered with an underhand motion. 

  • A stowaway on a seagoing vessel. 

verb
  • To sink or submerge oneself. 

  • To torpedo; to destroy with a sudden sneak attack. 

  • To operate or serve on a submarine. 

  • To slide forwards underneath one's seat belt (during a crash or sudden stop). 

adj
  • Existing, relating to, or made for use beneath the sea. 

  • Hidden or undisclosed. 

  • Of a pitch, thrown with the hand lower than the elbow. 

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