put under a spell vs voodoo

put under a spell

voodoo

verb

  • To bewitch someone or something using voodoo 

noun

  • 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. 

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

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