molar vs whetstone

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. 

whetstone

noun
  • A sharpening stone; a hard stone or piece of synthetically bonded hard minerals that has been formed with at least one flat surface, used to sharpen or hone an edged tool. 

  • A benchmark for evaluating the power and performance of a computer. 

  • A stimulant. 

verb
  • To sharpen with a whetstone. 

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