hand on vs sign over

hand on

verb
  • To transfer (something) to someone else, especially as a replacement for oneself (such as an official office or duty); to transfer something that was originally given to oneself from someone else. 

sign over

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

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