alleyway vs passageway

alleyway

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

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

passageway

noun
  • A covered walkway, between rooms or buildings. 

  • Any way for passing in, out or through something. 

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