kedge vs mooring

kedge

noun
  • A small anchor used for warping a vessel. 

  • A glutton. 

verb
  • To move with the help of a kedge, as described above. 

  • To warp (a vessel) by carrying out a kedge in a boat, dropping it overboard, and hauling the vessel up to it. 

mooring

noun
  • A place to moor a vessel. 

  • The act of securing a vessel with a cable or anchor etc. 

  • Something to which one adheres, or the means that helps one to maintain a stable position and keep one's identity - moral, intellectual, political, etc. 

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