buildup vs deflation

buildup

noun
  • An accumulation; an increase; a gradual development. 

  • The construction of a composite core to repair a damaged tooth. 

deflation

noun
  • A decrease in the general price level, that is, in the nominal cost of goods and services as well as wages. 

  • The removal of soil and other loose material from the ground (or another surface) by wind, leaving it exposed to erosion. 

  • An act or instance of deflating. 

  • An economic contraction. 

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