accommodation ladder vs alleyway

accommodation ladder

noun
  • a flight of stairs or a ladder for lowering over the side of a ship for access to and from a small boat. 

  • The property ladder, without the implication of necessarily owning the place where one lives. 

alleyway

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

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

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