loafer vs might-have-been

loafer

verb
  • To loaf around; to be idle. 

noun
  • An idle person. 

  • A wolf, especially a grey or timber wolf. 

  • A shoe with no laces, resembling a moccasin. 

might-have-been

noun
  • Someone or something whose potential greatness was not achieved. 

How often have the words loafer and might-have-been occurred in a corpus of books? (source: Google Ngram Viewer )