back forty vs off the beaten track

back forty

noun
  • The most remote or inaccessible part of any place. 

  • The remote part of a farm. 

off the beaten track

prep
  • In a place or places not commonly visited. 

  • To a place or places not commonly visited. 

How often have the words back forty and off the beaten track occurred in a corpus of books? (source: Google Ngram Viewer )