emphatic vs operant

emphatic

adj
  • Characterized by emphasis; forceful. 

  • Belonging to a set of English tense forms comprising the auxiliary verb do + an infinitive without to. 

  • Stated with conviction. 

  • pharyngealized consonants in Arabic, Hebrew, other Northwest Semitic languages, and Berber languages 

  • Referring to the above consonants as well as /ħ/ and /ʕ/ (these being seen as emphatic equivalents of /h/ and /ʔ/). 

  • ejective consonants in Ge'ez, Amharic, other Ethiopic Semitic languages, Chadic and Cushitic languages 

noun
  • An emphatic consonant. 

  • A word or phrase adding emphasis, such as "a lot" or "really". 

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