bump in the road vs middle of nowhere

bump in the road

noun
  • A very small town. 

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

middle of nowhere

noun
  • A very remote place; a nondescript place lacking population, interesting things, or defining characteristics. 

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