obeah vs wandwork

obeah

noun
  • A spell performed in the practice of the magic craft; an item associated with such a spell. 

  • A magician or witch doctor of the magic craft. 

  • A form of folk magic, medicine or witchcraft originating in Africa and practised in parts of the Caribbean. 

verb
  • To bewitch using this kind of folk magic. 

wandwork

noun
  • The use of a wand (or any such other instrument or tool) in any practical magical practice involving casting spells. 

  • The purpose or role of a wand (or any other instrument or tool) as an individual part constituting in the formulation of the inner workings or structure of a spell. 

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