dung beetle vs inkcap

dung beetle

noun
  • Any of the true dung beetles of subfamily Scarabaeinae. 

  • Any of the beetle of the family Scarabaeidae (scarab beetles), especially of the subfamilies Scarabaeinae and Aphodiinae, noted for rolling dung into balls for use as food or as brooding chambers. 

inkcap

noun
  • A fungus of one of the genera Coprinus, Coprinellus or Coprinopsis. 

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