adhesion vs grinding

adhesion

noun
  • The ability of a substance to stick to an unlike substance. 

  • An abnormal union of surface by the formation of new tissue resulting from an inflammatory process. 

  • Persistent attachment or loyalty. 

  • An agreement to adhere. 

  • The binding of a cell to a surface or substrate. 

  • The frictional grip on a surface, of wheels, shoes etc. 

grinding

noun
  • The action of grinding together or crushing into small particles. 

  • A form of dance in which two people rub their bodies together. 

  • Repeatedly performing the same quest or similar in-game activity in order to amass points or wealth. 

adj
  • Relentlessly taxing; burdensome; exacting to the point of exhaustion. 

  • Of or pertaining to the act or sound of grinding. 

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