gravy train vs laugher

gravy train

noun
  • An occupation or situation that generates considerable income or benefits while requiring little effort and carrying little risk. 

laugher

noun
  • One who laughs. 

  • A game in which an opponent is defeated by a sizable margin; a blowout. 

  • A variety of the domestic pigeon. 

How often have the words gravy train and laugher occurred in a corpus of books? (source: Google Ngram Viewer )