fish out of water vs rara avis

fish out of water

noun
  • A person in unfamiliar and often uncomfortable surroundings. 

rara avis

noun
  • A rare or unique, and thus outstanding or unusual, person or thing; a rare bird. 

  • A rare species or type of bird. 

How often have the words fish out of water and rara avis occurred in a corpus of books? (source: Google Ngram Viewer )