back o' Bourke vs jerkwater town

back o' Bourke

adv

  • At or to an extremely remote place. 

name

  • An extremely remote place. 

jerkwater town

noun

  • A small town with minimal facilities and conveniences. 

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