buy into vs disallow

buy into

verb
  • To believe; to accept a craze or fad as valid. 

  • To buy stocks or shares of (a business). 

disallow

verb
  • To reject as invalid, untrue, or improper 

  • to overrule a colonial legislation by the sovereign-in-privy council 

  • To refuse to allow 

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