shopping vs tag sale

shopping

noun
  • An area's combination of stores and other infrastructure and products available for people who want to shop. 

  • Recently bought goods. 

  • The process of buying goods or services, or searching for those suitable to buy. 

  • Placement in a workshop for overhaul. 

tag sale

noun
  • A retail sale in which items included in the sale are tagged with a coloured tag. 

  • A domestic sale of second-hand items; a garage sale or yard sale. 

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