edge of the earth vs north forty

edge of the earth

noun
  • A very remote place. 

north forty

noun
  • Any remote place. 

  • A 40-acre section of land, located in the northernmost part of a farm or ranch. 

  • Farms, ranches, or agricultural land collectively. 

How often have the words edge of the earth and north forty occurred in a corpus of books? (source: Google Ngram Viewer )