portage vs relay

portage

noun
  • The route used for such carrying. 

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

  • 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 

relay

noun
  • A series of vehicles travelling in sequence. 

  • A track and field discipline where runners take turns in carrying a baton from start to finish. Most common events are 4x100 meter and 4x400 meter competitions. 

  • An electrical actuator that allows a relatively small electrical voltage or current to control a larger voltage or current. 

  • A new set of horses kept along a specific route so that they can replace animals that are tired. 

  • A new set of hounds. 

  • A new set of anything. 

verb
  • To pass on or transfer (information). 

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