espouse vs wed

espouse

verb
  • To accept, support, or take on as one’s own (an idea or a cause). 

  • To become/get married to. 

wed

verb
  • To take to oneself and support; to espouse. 

  • To wager, stake, bet, place a bet, make a wager. 

  • To take as one's spouse. 

  • To take a spouse. 

  • To take each other as a spouse. 

  • To join or commit to, more or less permanently, as if in marriage. 

  • To perform the marriage ceremony for; to join in matrimony. 

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