intermediary vs mediopassive

intermediary

adj
  • Intermediate. 

noun
  • One or several stages of an event which occurs after the start and before the end. 

  • An agent acting as a mediator between sides to facilitate agreement or cooperation. 

  • A person or organisation in an intermediate position (in a transaction, agreement, supply chain etc.) 

mediopassive

adj
  • Pertaining to a voice of a transitive verb that is both middle voice and passive voice or reflexive and passive voice. 

noun
  • A mediopassive construction; a phrase that uses the mediopassive voice. 

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