copperhead vs fire-crotch

copperhead

noun
  • Someone with ginger hair. 

  • Coelognathus radiatus (syn. Elaphe radiata), the copperhead rat snake, a non-venomous colubrid species found in southern Asia. 

  • Agkistrodon contortrix, a venomous pit viper species found in parts of North America. 

  • Deinagkistrodon acutus, the Chinese copperhead, a venomous pit viper species found in Southeast Asia 

  • Austrelaps spp. (Australian copperheads), a genus of venomous elapids found in southern Australia and Tasmania. 

fire-crotch

noun
  • A person who has red pubic hair. 

How often have the words copperhead and fire-crotch occurred in a corpus of books? (source: Google Ngram Viewer )