pitching vs throwing

pitching

noun
  • The act of throwing or casting. 

  • The rough paving of a street to a grade with blocks of stone. 

  • A facing of stone laid upon a bank to prevent wear by tides or currents. 

throwing

noun
  • The act by which something is thrown. 

  • The process of making ceramic ware on the potter's wheel 

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