sike vs wellhead

sike

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

  • A sigh. 

verb
  • To sigh or sob. 

wellhead

noun
  • The place where a spring breaks out of the ground; the source of water for a stream or well. 

  • The source of something; a fountainhead. 

  • The surface structure of an oil well etc. 

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