feedforward vs forecast

feedforward

verb
  • To respond in advance 

noun
  • An anticipatory response to expected changes in the environment of a system 

forecast

verb
  • To foreshadow; to suggest something in advance. 

  • To estimate how something will be in the future. 

noun
  • exacta 

  • An estimation of a future condition. 

  • A prediction of the weather. 

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