buy vs go for

buy

verb
  • to accept as true; to believe 

  • 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. 

noun
  • Something which is bought; a purchase. 

go for

verb
  • To favor, accept; to have a preference for. 

  • To try for, to attempt to reach. 

  • To attack. 

  • To develop a strong interest in, especially in a sudden manner; to be infatuated with. 

  • To apply equally to. 

  • To undertake (an action); to choose an option. 

  • To suffice to be used for; to serve as. 

  • Used other than figuratively or idiomatically: see go, for. 

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