feedforward vs look ahead to

feedforward

verb
  • To respond in advance 

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

look ahead to

verb
  • To plan for the future; to look forward to something; to be excited for something happening in the future. 

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