pipe snake vs roughtail

pipe snake

noun

  • Shieldtail snake, family Uropeltidae. 

  • Synonym of plumber's snake 

roughtail

noun

  • A small snake of the family Uropeltidae. 

  • The roughtail stingray 

adj

  • Having a rough tail. 

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