shaman vs soothsayer

shaman

noun
  • A traditional (unscientific) faith healer. 

  • A member of certain tribal societies who acts as a spiritual and, or religious medium between the concrete and spirit worlds. 

soothsayer

noun
  • One who predicts the future, using magic, intuition or intelligence; a diviner. 

  • A mantis or rearhorse. 

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