moonfish vs sunfish

moonfish

noun
  • Family Molidae (ocean sunfish) 

  • Most species of genus Selene 

  • Family Monodactylidae (fingerfishes, silver angelfishes) 

  • The cusk (Brosme brosme), a North Atlantic cod-like fish in the ling family Lotidae, the only species in its genus. 

  • The opahs in the family Lamprididae. 

  • Atlantic spadefish (Chaetodipterus faber) 

  • Mene maculata, of tropical coastal waters of the Indo-Pacific 

  • The southern platyfish (Xiphophorus maculatus) 

sunfish

noun
  • Any of various large marine fishes of the family Molidae that have an oval compressed body. 

  • Any of various small freshwater fishes of the family Centrarchidae, often with iridescent colours and having a laterally compressed body. 

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