hickory vs shillelagh

hickory

noun
  • A club made from this wood. 

  • The wood of these trees. 

  • Any of various deciduous hardwood trees of the genus Carya or Annamocarya. 

  • A coarse, durable cotton fabric. 

  • Carya illinoinensis is the source of pecan nuts. 

adj
  • Of or pertaining to the hickory tree or its wood. 

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 hickory and shillelagh occurred in a corpus of books? (source: Google Ngram Viewer )