demigod vs tin god

demigod

noun
  • Someone held up for reverence as a supreme example. 

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

tin god

noun
  • An individual who abuses or exceeds his/her authority over others, frequently in petty ways. 

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