tampering vs travesty

tampering

noun
  • The act of one who tampers. 

travesty

noun
  • An absurd or grotesque misrepresentation. 

  • A grossly inferior imitation. 

  • A parody or stylistic imitation. 

  • An appalling version of something. 

verb
  • To make a travesty of; to parody. 

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