say no vs taboo

say no

verb
  • To reject something. 

  • To disagree; to think something or someone is doing or saying what is wrong. 

taboo

verb
  • To avoid. 

  • To ban. 

  • To mark as taboo. 

noun
  • An inhibition or ban that results from social custom or emotional aversion. 

  • Something which may not be used, approached or mentioned because it is sacred. 

adj
  • Culturally forbidden. 

  • Excluded or forbidden from use, approach or mention. 

How often have the words say no and taboo occurred in a corpus of books? (source: Google Ngram Viewer )