mudfish vs tope

mudfish

noun
  • Heterobranchus didorsalis (African catfish) 

  • Clarias spp., including Clarias anguillaris, Clarias gariepinus, Clarias agboyiensis, Clarias leviceps 

  • Channa striata (striped snakehead) 

  • Chrysichthys nigrodigitatus (bagrid catfish) 

  • Clarotes laticeps (widehead catfish) 

  • Protopterus annectens (West African lungfish) 

  • All species of Neochanna 

tope

noun
  • A small, grey, European shark, Galeorhinus galeus, that has rough skin and a long snout. 

  • A grove of trees. 

  • A mound-like Buddhist sepulchre, or memorial monument, often erected over a relic; a stupa. 

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