go-ahead vs operant

go-ahead

adj
  • Dashing; energetic. 

  • Progressive; exerting leadership. 

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

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

operant

adj
  • That operates to produce an effect. 

noun
  • Any of a class of behaviors that produce consequences by operating (i.e., acting) upon the environment. 

  • An operative person or thing. 

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