transitive verb vs unergative

transitive verb

noun
  • A verb that is accompanied (either clearly or implicitly) by a direct object in the active voice. It links the action taken by the subject with the object upon which that action is taken. Consequently, transitive verbs can also be used in the passive voice when the direct object of the equivalent active-voice sentence becomes the subject. 

unergative

noun
  • An unergative verb. 

adj
  • Intransitive and having an agent as its subject. 

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