backward-looking vs go-ahead

backward-looking

adj
  • Not progressive; concerned with the past rather than the present or future. 

go-ahead

noun
  • Approval, agreement, or instruction to begin or proceed. 

adj
  • Progressive; exerting leadership. 

  • Being a score which gives the scoring team or player the lead in the game. 

  • Dashing; energetic. 

How often have the words backward-looking and go-ahead occurred in a corpus of books? (source: Google Ngram Viewer )