chafe vs graffiti

chafe

verb
  • To be worn by rubbing. 

  • To have a feeling of vexation; to be vexed; to fret; to be irritated. 

  • To excite heat in by friction; to rub in order to stimulate and make warm. 

  • To excite passion or anger in; to fret; to irritate. 

  • To fret and wear by rubbing. 

  • To rub; to come together so as to wear by rubbing; to wear by friction. 

noun
  • Injury or wear caused by friction. 

  • Vexation; irritation of mind; rage. 

  • Heat excited by friction. 

graffiti

verb
  • To mark a surface with such images. 

noun
  • Drawings or words drawn on a surface in a public place, usually made without authorization. 

  • Informal inscriptions, figure drawings, etc., as opposed to official inscriptions. 

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