Idaho vs bump in the road

Idaho

noun
  • In full Idaho potato: a variety of potato grown in Idaho, especially the Russet Burbank. 

name
  • A state in the western United States. Capital and largest city: Boise. 

  • An unincorporated community in Pike County, Ohio, United States, named for Idaho Territory. 

  • University of Idaho 

bump in the road

noun
  • A very small town. 

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

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