firewood vs firing

firewood

noun
  • Wood intended to be burned, typically for heat. 

firing

noun
  • The fuel for a fire. 

  • Cauterization. 

  • The process of applying heat or fire, especially to clay, etc., to produce pottery. 

  • The dismissal of someone from a job. 

  • The discharge of a gun or other weapon. 

  • The act of adding fuel to a fire. 

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