attorn vs negotiate

attorn

verb
  • To transfer one's obligations from a person to another person. 

  • To consent to the transfer of one's obligations as tenant under a lease to a new landlord. 

  • To acknowledge the jurisdiction of (a particular court) over one's dispute. 

negotiate

verb
  • To transfer to another person with all the rights of the original holder; to pass, as a bill. 

  • To succeed in coping with, or getting over something. 

  • To arrange or settle something by mutual agreement. 

  • To confer with others in order to come to terms or reach an agreement. 

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