Cassandra vs wet blanket

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. 

wet blanket

noun
  • A timid person; one who lacks confidence; a wimp. 

  • A person who takes the fun out of a situation or activity, as by pessimism, demands, dullness, etc. 

  • Used other than figuratively or idiomatically: see wet, blanket. 

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