columbiform vs cushat

columbiform

noun
  • Any bird of the order Columbiformes. 

adj
  • Having the form of a dove or pigeon; of the order Columbiformes. 

cushat

noun
  • A pigeon, wood pigeon or ring dove. 

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