sike vs syke

sike

noun
  • A gutter or ditch; a small stream that frequently dries up in the summer. 

  • A sigh. 

verb
  • To sigh or sob. 

syke

noun
  • A roundel barry wavy argent and azure; a fountain. 

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