inflation vs stacking up

inflation

noun
  • An extremely rapid expansion of the universe, theorized to have occurred very shortly after the Big Bang. 

  • An increase in the general level of prices or in the cost of living. 

  • An increase in the quantity of money, leading to a devaluation of existing money. 

  • A decline in the value of money. 

  • Undue expansion or increase, as of academic grades. 

  • An act, instance of, or state of expansion or increase in size, especially by injection of a gas. 

stacking up

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