fresh meat vs probie

fresh meat

noun
  • Used other than figuratively or idiomatically: see fresh, meat. 

  • A person or group of people who arouse one's interest, either as a new target for deception, humiliation or ridicule, or as a potential love interest or one-night stand. 

  • Any newcomer. 

probie

noun
  • Someone holding a position on a probationary basis, subject to performance or examination. 

  • A neophyte firefighter. 

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