clientage vs shopping

clientage

noun
  • the condition of being a client 

  • clients collectively; clientele 

shopping

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

  • Recently bought goods. 

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

  • Placement in a workshop for overhaul. 

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