convey vs sign over

convey

verb
  • To transfer legal rights (to). 

  • To move (something) from one place to another. 

  • To communicate; to make known; to portray. 

sign over

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

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