avenue vs national road

avenue

noun
  • The principal walk or approach to a house which is withdrawn from the road, especially, such approach bordered on each side by trees; any broad passageway thus bordered. 

  • A method or means by which something may be accomplished. 

  • A broad street, especially one bordered by trees or, in cities laid out in a grid pattern, one that is on a particular side of the city or that runs in a particular direction. 

  • A way or opening for entrance into a place; a passage by which a place may be reached; a way of approach or of exit. 

national road

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