sell-by date vs use-by date

sell-by date

noun
  • The final date on which a perishable product can be legally sold to the public. 

  • Used to indicate that something, or someone, is old and out of date. 

use-by date

noun
  • The date by which it is advised that a perishable product be consumed. 

How often have the words sell-by date and use-by date occurred in a corpus of books? (source: Google Ngram Viewer )