poor thing vs ratfink

poor thing

noun

  • Someone or something to be pitied 

ratfink

noun

  • A dislikable or contemptible person. 

  • An informer or spy; a traitor. 

verb

  • To inform on; to betray. 

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