bird dog vs roper

bird dog

noun
  • A person who tries to steal someone else's romantic partner 

  • A dog, especially a pointer, used in shooting to retrieve the dead birds. 

  • A tout. 

  • A person who seeks out real estate investment opportunities in exchange for a fee. 

  • A radar detector (for detecting police speed traps). 

  • A hyperextension exercise performed lying on the knees, with one arm and the opposite leg lifted. 

verb
  • A multiservice tactical brevity code requesting configuration of sensors. 

  • To seek out. 

  • To watch closely. 

roper

noun
  • Synonym of outside man (“accomplice who locates a mark to be swindled by a confidence trickster”) 

  • One who ropes goods; a packer. 

  • An undercover informer. 

  • Any of a variety of monsters with tentacles that they use to capture victims. 

  • A person hired by a gambling establishment to locate potential customers and bring them in. 

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