portage vs transference

portage

noun
  • An act of carrying, especially the carrying of a boat overland between two waterways. 

  • The route used for such carrying. 

  • The wages paid to a sailor when in port, or for a voyage. 

  • A charge made for carrying something. 

  • Carrying capacity; tonnage. 

  • A porthole. 

verb
  • To carry a boat overland 

transference

noun
  • The act of conveying from one place to another; the act of transferring or the fact of being transferred. 

  • The process by which emotions and desires, originally associated with one person, such as a parent, are unconsciously shifted to another. 

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