cream puff vs mollusc

cream puff

noun
  • A weak or ineffectual person. 

  • An old motor vehicle in especially good condition. 

  • A light, hollow pastry typically filled with cream or custard. 

  • A weak hit. 

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 cream puff and mollusc occurred in a corpus of books? (source: Google Ngram Viewer )