back road vs road

back road

noun
  • A secondary road, a little-used road, a road through rural areas sometimes used as an alternative to main roads. 

road

noun
  • A way used for travelling between places, originally one wide enough to allow foot passengers and horses to travel, now (US) usually one surfaced with asphalt or concrete and designed to accommodate many vehicles travelling in both directions. In the UK both senses are heard: a country road is the same as a country lane. 

  • A partly sheltered area of water near a shore in which vessels may ride at anchor; a roadstead. 

  • A railway or (UK, rail transport) a single railway track. 

  • A path chosen in life or career. 

  • A way or route. 

  • Roads in general as a means of travel, especially by motor vehicle. 

  • An underground tunnel in a mine. 

adj
  • At the venue of the opposing team or competitor; on the road. 

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