arcade vs courtyard

arcade

noun
  • A covered passage, usually with shops on both sides. 

  • An establishment that runs coin-operated games. 

  • A row of arches. 

verb
  • To cover (something) as with a series of arches. 

courtyard

noun
  • An area, open to the sky, partially or wholly surrounded by walls or buildings. 

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