HORSE vs arsehole

HORSE

noun
  • A poker variant consisting of five different poker variants, with the rules changing from one variant to the next after every hand. 

arsehole

noun
  • An inconsiderate or mean-spirited person. Less vulgar and intense than fucker or cunt. 

  • A variant of the card game big two. 

  • The anus. 

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