duke vs fiver

duke

noun
  • A fist. 

  • The male ruler of a duchy (female equivalent: duchess). 

  • A grand duke. 

  • The sovereign of a small state. 

  • A high title of nobility; the male holder of a dukedom. 

  • Any of various nymphalid butterflies of the Asian genera Bassarona and Dophla. 

verb
  • To hit or beat with the fists. 

  • To give cash to; to give a tip to. 

fiver

noun
  • A clenched fist. 

  • A mathematical puzzle played on a 5 × 5 grid. 

  • A person who gives five percent of their income or five hours a week of their time to charity (a reduction of ten percent tithing). 

  • A Zaydi Shiite Muslim, who disagrees with the majority of Shiites on the identity of the Fifth Imam. 

  • A banknote with a value of five units of currency. 

  • The value in money that this represents. 

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