diehard vs humanitarian

diehard

noun
  • A person with such an attitude. 

adj
  • Unreasonably or stubbornly resisting change. 

  • Fanatically opposing progress or reform. 

  • Complete; having no opposite opinion of anything in a particular topic of one's values; thorough of in one's beliefs. 

humanitarian

noun
  • A person concerned with people's welfare; a do-gooder or philanthropist. 

  • Synonym of humanist (“a person who believes in the philosophy of humanism”) 

  • One who believes that Jesus Christ is fully human and not divine. 

adj
  • Synonym of humanist (“relating to humanism”) 

  • Of or pertaining to the belief that Jesus Christ is fully human and not divine. 

  • Concerned with people's welfare, and the alleviation of suffering; compassionate, humane. 

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