spellcaster vs volkhv

spellcaster

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

volkhv

noun
  • a priest from Slavic neopaganism 

  • a pre-Christian priest from Slavic cultures 

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