diabolism vs voodoo

diabolism

noun
  • Character, action, utterances, creative works, behavior or principles appropriate to the devil. 

  • Worship of the devil; Satanism 

  • Possession by Satan or other demonic forces. 

  • The property of having attributes that are demonic or Satanic. 

voodoo

noun
  • Any sort of magical or irrational approach to a problem. 

  • Any of a group of related religious practices found chiefly in and around the Caribbean, particularly in Haiti and Louisiana. 

  • The spiritual beliefs of the Ewe/Fon of West Africa, practiced chiefly in Benin and in the south of Togo. 

verb
  • To bewitch someone or something using voodoo 

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