attorn vs reallocate

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. 

reallocate

verb
  • To allocate (a resource) to another person or purpose. 

  • To allocate again. 

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