fisherman vs monkfish

fisherman

noun
  • Any person who attempts to catch fish. 

  • A person whose profession is catching fish. 

  • A vessel (boat or ship) used for fishing. 

monkfish

noun
  • Any large bottom-dwelling anglerfish of the genus Lophius, such as Lophius piscatorius, of the Atlantic, having a large head and mouth. 

  • Angel sharks of the genus Squatina. 

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