Minnesota vs bump in the road

Minnesota

name
  • A state in the Upper Midwest region of the United States. Capital: Saint Paul. Largest city: Minneapolis. 

  • A former territory (1849–1858) of the United States, encompassing the modern state and part of the Dakotas. Capital: Saint Paul. 

  • A tributary of the Mississippi River in southern Minnesota. 

  • University of Minnesota, Twin Cities. 

bump in the road

noun
  • A very small town. 

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

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