graffiti vs lube

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. 

lube

verb
  • To lubricate. 

adj
  • Lubricating. 

noun
  • Lubricant. 

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