alley vs metro

alley

noun
  • A narrow street or passageway, especially one through the middle of a block giving access to the rear of lots of buildings. 

  • The area between the outfielders. 

  • Any passage having the entrance represented as wider than the exit, so as to give the appearance of length. 

  • A passageway between rows of pews in a church. 

  • A walk or passage in a garden or park, bordered by rows of trees or bushes. 

  • The space between two rows of compositors' stands in a printing office. 

  • An establishment where bowling is played. 

  • The extra area between the sidelines or tramlines on a tennis court that is used for doubles matches. 

  • A glass marble or taw. 

  • An elongated wooden strip of floor along which a bowling ball is rolled. 

metro

noun
  • A metropolitan area. 

  • An urban rapid transit rail transport system, normally with lighter track and light trains (i.e. an S-Bahn or similar), or a train in such systems. 

  • A rapid transit rail transport system, or a train in such systems, generally underground and serving a metropolitan area. 

adj
  • metropolitan 

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