grinder vs premolar

grinder

noun
  • Any tooth. 

  • A biohacker who uses cybernetic implants or biochemicals to enhance or change their own body. 

  • A hard-working, physical player with limited offensive ability. 

  • A kitchen gadget for processing coffee, herbs etc. into small or powdered pieces. 

  • A low-ranking attorney with no clients who works very hard. 

  • One who grinds something, such as the teeth. 

  • A fan or performer of grindcore music. 

  • A power tool with a spinning abrasive disc, used for grinding, smoothing, and shaping materials, usually metal. 

  • A sandwich made on a long, cylindrical roll. 

  • A molar. 

  • Atmospheric interference producing a roaring background noise. 

  • An outdoor space for drills and parades. 

  • The restless flycatcher (Myiagra inquieta) of Australia, which makes a noise like a scissors grinder. 

premolar

noun
  • A tooth situated in front of the molar teeth; especially a tooth in humans with two cusps which is between the canines and the molars (Latin: singular dens premolaris, plural dentes premolares) 

adj
  • Before a molar tooth, either in physical position or in its time of development; deciduous. 

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