restriction vs taboo

restriction

noun
  • A regulation or limitation that restricts. 

  • The act of restricting, or the state of being restricted. 

  • The mechanism by which a cell degrades foreign DNA material. 

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. 

verb
  • To ban. 

  • To avoid. 

  • To mark as taboo. 

adj
  • Culturally forbidden. 

  • Excluded or forbidden from use, approach or mention. 

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