pigeon vs turtle dove

pigeon

noun
  • One of several birds of the family Columbidae, which consists of more than 300 species. 

  • The meat from this bird. 

  • A person who is a target or victim of a confidence game. 

  • A person hired to transport film footage out of a region where transport options are limited. 

  • A weak or useless person. 

  • A pacifist, appeaser, an isolationist, a dove. 

verb
  • To deceive with a confidence game. 

turtle dove

noun
  • Any of several (species of) birds, called by this traditional name, mainly in the genus Streptopelia, of the family Columbidae (doves and pigeons, which also included the extinct passenger pigeon, dodo, and solitaire). 

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