operant vs subsidiary

operant

noun
  • An operative person or thing. 

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

adj
  • That operates to produce an effect. 

subsidiary

noun
  • One who aids or supplies; an assistant. 

  • A company owned by a parent company or a holding company, also called daughter company or sister company. 

  • A subordinate theme. 

adj
  • Of or relating to a subsidy. 

  • Auxiliary or supplemental. 

  • Secondary or subordinate. 

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