bag of nerves vs milksop

bag of nerves

noun
  • A very nervous person. 

milksop

noun
  • An easily frightened, ineffectual, or weak person. 

  • A piece of bread sopped in milk. 

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

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