slummock vs wrong 'un

slummock

noun
  • A slovenly person 

verb
  • To behave awkwardly or clumsily 

  • To behave lazily or indolently 

wrong 'un

noun
  • A googly. 

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

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

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