Laser vs rutter

Laser

noun
  • A simple type of dinghy 

rutter

noun
  • A type of plough used by lumberjacks to carve a track for a sleigh. 

  • A tool used in peat cutting or for marking off ground. 

  • A horseman or cavalryman, especially a German one, associated with the wars of the 16th and 17th centuries. 

  • A set of instructions for navigating a course at sea; a pilot's book or seaman's guide. 

  • The penis. 

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