best man vs godfather

best man

noun
  • The primary attendant to the groom in a wedding ceremony. 

  • Used other than figuratively or idiomatically: see best, man. 

godfather

noun
  • A man present at the christening of a baby who promises to help raise the child in a Christian manner; a male godparent who sponsors the baptism of a child. 

  • A mafia leader. 

  • A small post which is used in repairing a fence. For instance attached to and supporting an existing broken fence post. 

verb
  • To act as godfather or guardian to. 

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