buy vs vend

buy

noun
  • Something which is bought; a purchase. 

verb
  • To make a purchase or purchases, to treat (for a drink, meal or gift) 

  • To make a bluff, usually a large one. 

  • To bribe. 

  • To be equivalent to in value. 

  • To obtain (something) in exchange for money or goods. 

  • To obtain, especially by some sacrifice. 

  • to accept as true; to believe 

vend

noun
  • The act of vending or selling; a sale. 

  • The letter Ꝩ/ꝩ, used in Old Norse, related to the rune wynn (ᚹ, whence also Latin-script Ƿ/ƿ) but with the bowl open at the top, like a y. 

verb
  • Synonym of sell, now especially to sell through a vending machine. 

  • To provide or export functionality, especially from an API. 

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