broker vs intermediate

broker

verb
  • To act as a broker in; to arrange or negotiate. 

  • To act as a broker; to mediate in a sale or transaction. 

noun
  • An agent involved in the exchange of messages or transactions. 

  • A mediator between a buyer and seller. 

  • A stockbroker. 

  • A mediator in general, one who liaises between two or more parties to attempt to achieve an outcome of some kind. 

intermediate

verb
  • To arrange, in the manner of a broker. 

  • To mediate, to be an intermediate. 

noun
  • Any substance formed as part of a series of chemical reactions that is not the end-product. 

  • An intermediary. 

  • Anything in an intermediate position. 

adj
  • Being between two extremes, or in the middle of a range. 

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