handover vs relocation

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. 

relocation

noun
  • The act of moving from one place to another. 

  • The assigning of addresses to variables either at linkage editing, or at runtime. 

  • Renewal of a lease. 

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