feedforward vs presage

feedforward

verb
  • To respond in advance 

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

presage

verb
  • To have a presentiment of; to feel beforehand; to foreknow. 

  • To make a prediction. 

  • To predict or foretell something. 

noun
  • A warning of a future event; an omen. 

  • An intuition of a future event; a presentiment. 

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