rookie vs trifler

rookie

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

  • A novice. 

  • 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 

trifler

noun
  • A pewterer who produced small pewter utensils such as salt cellars. 

  • One who trifles, or treats something as inconsequential. 

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