autochthon vs lessee

autochthon

noun
  • A large mass of rock in the place of its original formation, rooted to its basement (foundation rock) as opposed to an allochthon or nappe which has shifted from the place of formation; an autochthonous rock formation. 

  • The earliest inhabitant of an area; an aborigine. 

lessee

noun
  • An individual or a corporation who has the right of use of something of value, gained through a lease agreement with the real owner of the property. 

  • Someone who is allowed to use a house, building, land etc. for a period of time in return for payment to the owner. 

  • The entity to whom a lease is given, or who takes an estate by lease. 

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