fisherman vs kingfisher

fisherman

noun
  • Any person who attempts to catch fish. 

  • A person whose profession is catching fish. 

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

kingfisher

noun
  • common kingfisher (Alcedo atthis) 

  • Any of various birds of the suborder Alcedines (or the family Alcedinidae sensu lato), having a large head, short tail and brilliant colouration; they feed mostly on fish. 

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