demigod vs goddess

demigod

noun
  • A half-god or hero; the offspring of a deity and a mortal. 

  • Someone held up for reverence as a supreme example. 

goddess

noun
  • A female deity. 

  • A woman of substantial authority or influence. 

  • A woman honored or adored as physically attractive or of superior charm and intelligence. 

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