back forty vs bump in the road

back forty

noun
  • The remote part of a farm. 

  • The most remote or inaccessible part of any place. 

bump in the road

noun
  • A very small town. 

  • A setback or obstacle, especially one which is relatively minor. 

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