Cassandra vs doubting Thomas

Cassandra

noun
  • A person who makes dire predictions, especially those which are not believed but which turn out to be true. 

name
  • A female given name from Ancient Greek. 

  • An unincorporated community in Walker County, Georgia, United States. 

  • A prophetess who was daughter of King Priam of Troy and his queen Hecuba. She captured the eye of Apollo and was granted the ability to see the future; however, she was destined never to be believed. 

  • A small borough in Cambria County, Pennsylvania, United States. 

doubting Thomas

noun
  • One who finds belief difficult. 

  • One who requires proof before believing. 

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