slyboots vs wrong 'un

slyboots

noun
  • A person who is clever or shrewd, especially one who is stealthy, manipulative, and rather charming. 

wrong 'un

noun
  • A dishonest or disreputable person; a crook or rogue. 

  • A horse deliberately held back in order to lose a race. 

  • A googly. 

How often have the words slyboots and wrong 'un occurred in a corpus of books? (source: Google Ngram Viewer )