milksop vs mollusc

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. 

mollusc

noun
  • A weak-willed person. 

  • A soft-bodied invertebrate of the phylum Mollusca, typically with a hard shell of one or more pieces. 

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