headspring vs sike

headspring

noun
  • A fountainhead; a source. 

  • A move in which the gymnast places both hands on the mat with the top of the head about 6 inches in front, pushes off with the hands while flipping the legs overhead, and lands on the feet. 

  • A basis or foundation. 

  • A spring that sits at the top of a mechanism, pushing the internal parts inward. 

verb
  • To perform a headspring. 

sike

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

  • A sigh. 

verb
  • To sigh or sob. 

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