arcade vs portico

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. 

portico

noun
  • A porch, or a small space with a roof supported by columns, serving as the entrance to a building. 

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