undertake vs wed

undertake

verb
  • To commit oneself (to an obligation, activity etc.). 

  • To pass a slower moving vehicle on the curbside rather than on the side closest to oncoming traffic. 

  • To take upon oneself; to start, to embark on (a specific task etc.). 

noun
  • The passing of slower traffic on the curbside rather than on the side closest to oncoming traffic. 

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 undertake and wed occurred in a corpus of books? (source: Google Ngram Viewer )