gilt vs yilt

gilt

adj
  • Golden coloured. 

noun
  • A young female pig, at or nearing the age of first breeding. 

  • Gold-colored paint or other coating. 

  • Gold or other metal in a thin layer; gilding. 

  • A security issued by the Bank of England (see gilt-edged). 

  • Money. 

yilt

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