sign over vs transplant

sign over

verb
  • To transfer (property or rights) to somebody else by signing a document. 

transplant

verb
  • To transfer (tissue or an organ) from one body to another, or from one part of a body to another. 

  • To remove (something) and establish its residence in another place; to resettle or relocate. 

  • To uproot (a growing plant), and plant it in another place. 

noun
  • An act of uprooting and moving (something), especially and archetypically a plant. 

  • Anything that is transplanted, especially and archetypically a plant. 

  • An operation (procedure) in which tissue or an organ is transplanted: an instance of transplantation. 

  • Someone who is not native to their area of residence. 

  • A transplanted organ or tissue: a graft. 

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