baseball bat vs shillelagh

baseball bat

noun
  • A long instrument, typically wood, metal, or plastic, which is swung to strike baseballs. 

shillelagh

noun
  • A wooden (traditionally blackthorn (sloe) wood) club ending with a large knob. 

  • Any cudgel, whether or not of Irish origin. 

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