badger vs bullhead

badger

noun
  • Any mammal of three subfamilies, which belong to the family Mustelidae: Melinae (Eurasian badgers), Mellivorinae (ratel or honey badger), and Taxideinae (American badger). 

  • A native or resident of the American state, Wisconsin. 

verb
  • To pester; to annoy persistently; to press. 

bullhead

noun
  • The black bullhead, Ameiurus melas. 

  • A bullhead rail. 

  • The yellow bullhead, Ameiurus natalis. 

  • A fish of species Gobiomorphus gobioides. 

  • An obstinate person. 

  • The European bullhead, Cottus gobio. 

  • The brown bullhead, Ameiurus nebulosus. 

  • Any of various sculpins of the suborder Scorpaenoidei 

  • A chronograph (watch or stopwatch) with two push buttons arranged like the horns of a bull on the top end of the case, typically with the crown between them. 

  • A bullhead shark (Heterodontus spp.). 

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