grocery vs shopping center

grocery

noun
  • A shop or store that sells groceries; a grocery store. 

  • retail foodstuffs and other household supplies. 

verb
  • To go grocery shopping. 

  • To furnish with groceries. 

shopping center

noun
  • An area, either enclosed or unenclosed, hosting multiple retail establishments; a shopping mall. 

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