bump in the road vs hindrance

bump in the road

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

  • A very small town. 

hindrance

noun
  • Something which hinders: something that holds back or causes problems with something else. 

  • The state or act of hindering something 

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