kingfisher vs white croaker

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. 

white croaker

noun
  • Pennahia argentata, a species of croaker found in the Northwest Pacific 

  • Genyonemus lineatus, a species of croaker found in the Eastern Pacific 

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