conker vs cordwainer

conker

noun
  • A horse chestnut, used in the game of conkers. 

cordwainer

noun
  • A leather from Córdoba. 

  • A member of the Worshipful Company of Cordwainers, a livery company. 

  • A worker in cordwain. 

  • A shoemaker. 

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