cession vs handover

cession

noun
  • The giving up of rights, property etc. which one is entitled to. 

  • A risk, or part of one, which is transferred from one actor to another. 

  • That which is ceded. 

handover

noun
  • The transference of authority, control, power or knowledge from one agency to another, or from one state to another. 

  • the process of transferring an ongoing call or data session from one channel connected to the core network to another channel. 

  • The transfer of goods from the dealer to the purchaser, often of illegal goods. 

  • the process of transferring satellite control responsibility from one earth station to another without loss or interruption of service. 

  • The information passed on in such a case. 

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