constructive vs operant

constructive

adj
  • Imputed by law; created to give legal effect to something for equitable reasons, as with constructive notice or a constructive trust. 

  • Relating to or causing construction. 

  • Not direct or expressed, but inferred. 

  • Carefully considered and meant to be helpful. 

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 constructive and operant occurred in a corpus of books? (source: Google Ngram Viewer )