mollusc vs vagina

mollusc

noun
  • A weak-willed person. 

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

vagina

noun
  • A coward; a weakling; a pussy. 

  • The vulva, or the vulva and the vaginal passage collectively. 

  • A similar part in some invertebrates. 

  • A sheathlike structure, such as the leaf of a grass that surrounds a stem. 

  • The passage leading from the opening of the vulva to the cervix of the uterus for copulation and childbirth in female mammals. 

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