handfast vs marry off

handfast

verb
  • To betroth by joining hands, in order to allow for cohabitation before the celebration of marriage; to marry provisionally. 

  • To pledge; to bind. 

adj
  • Strong; steadfast. 

marry off

verb
  • To successfully arrange the marriage of someone, especially a relative. 

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