stomachable vs sweetened

stomachable

adj
  • tolerable; capable of being stomached; not so distasteful as to be unacceptable. 

sweetened

adj
  • made more appealing or more attractive with incentives 

  • containing sweetener 

  • made to taste sweet 

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