baseball vs leather

baseball

noun
  • The ball used to play the sport of baseball. 

  • A variant of poker in which cards with baseball-related values have special significance. 

  • A sport common in North America, the Caribbean, and Japan, in which the object is to strike a ball so that one of a nine-person team can run counter-clockwise among four bases, resulting in the scoring of a run. The team with the most runs after termination of play, usually nine innings, wins. 

leather

noun
  • A cricket ball or football. 

  • A punch. 

  • A piece of the above used for polishing. 

  • A tough material produced from the skin of animals, by tanning or similar process, used e.g. for clothing. 

  • A good defensive play 

  • clothing made from the skin of animals, often worn by motorcycle riders. 

verb
  • To cover with leather. 

  • To spank or beat with a leather belt or strap. 

  • To strike forcefully. 

adj
  • Made of leather. 

  • Referring to one who wears leather clothing (motorcycle jacket, chaps over 501 jeans, boots), especially as a sign of sadomasochistic homosexuality. 

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