alleyway vs byway

alleyway

noun
  • A narrow street formed by the proximity of adjacent buildings. 

  • A passage between two rows of cabins in a ship. 

byway

noun
  • a road that is not frequently travelled. 

  • a little-known or arcane field of study or detail. 

  • a road or track not following a main route; a minor road or path. 

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