back o' Bourke vs bumfuck

back o' Bourke

name

  • An extremely remote place. 

adv

  • At or to an extremely remote place. 

bumfuck

verb

  • To fuck anally. 

adj

  • I hate living in this small town in the middle of bumfuck nowhere. 

  • Isolated and neglected, undesirable, or held in contempt. 

noun

  • Anal sex. 

  • An isolated place far removed from major cities. 

How often have the words back o' Bourke and bumfuck occurred in a corpus of books? (source: Google Ngram Viewer )