keeping vs sale

keeping

noun
  • Maintenance; support; provision; feed. 

  • conformity or harmony. 

  • charge or care. 

sale

noun
  • An exchange of goods or services for currency or credit. 

  • The act of putting up for auction to the highest bidder. 

  • The sale of goods at reduced prices. 

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