shillelagh vs swatter

shillelagh

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

  • Any cudgel, whether or not of Irish origin. 

swatter

noun
  • Something used to swat with; a flyswatter. 

  • Someone who swats. 

verb
  • To spill water about. 

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