Wiccan vs spellcaster

Wiccan

noun

  • A follower of Wicca. 

adj

  • Of or pertaining to the neo-pagan religion of Wicca. 

spellcaster

noun

  • One who casts spells; a magician; a sorcerer. 

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