milksop vs yellow-belly

milksop

noun
  • A piece of bread sopped in milk. 

  • A dish consisting of bread pieces in a bowl, sprinkled with sugar and covered in hot milk. 

  • An easily frightened, ineffectual, or weak person. 

yellow-belly

How often have the words milksop and yellow-belly occurred in a corpus of books? (source: Google Ngram Viewer )