(shopping) arcade vs flea market

(shopping) arcade

flea market

noun
  • A permanent indoor market of stalls in a warehouse selling inexpensive antiques, outdated goods, curios, etc. 

  • An outdoor temporary market selling inexpensive antiques, curios etc. 

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