graffiti vs vandalism

graffiti

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. 

verb
  • To mark a surface with such images. 

vandalism

noun
  • Willful damage to or destruction of any property, such as graffiti or defacement. 

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