cub vs rookie

cub

noun
  • Synonym of cub reporter 

  • A young man who seeks relationships with older women, or "cougars". 

  • A child, especially an awkward, rude, ill-mannered boy. 

  • A young fox. 

  • An adolescent furry character. 

  • The young of certain other animals, including the bear, wolf, lion and tiger. 

verb
  • To hunt fox cubs. 

  • To give birth to cubs. 

rookie

noun
  • A novice. 

  • A type of firecracker, used by farmers to scare rooks. 

  • An athlete either new to the sport or to a team or in his first year of professional competition, especially said of baseball, basketball, hockey and American football players. 

  • An inexperienced recruit, especially in the police or armed forces. 

adj
  • non-professional; amateur 

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