back road vs labyrinthine

back road

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

labyrinthine

adj
  • Physically resembling a labyrinth; with the qualities of a maze. 

  • Relating to the labyrinth of the inner ear. 

  • Convoluted, baffling, confusing, perplexing. 

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