transitive verb vs unaccusative

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. 

unaccusative

noun
  • An unaccusative verb. 

adj
  • Intransitive and having an experiencer as its subject, that is, the (syntactic) subject is not a (semantic) agent. 

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