bog vs bogle

bog

noun
  • The acidic soil of such areas, principally composed of peat; marshland, swampland. 

  • Confusion, difficulty, or any other thing or place that impedes progress in the manner of such areas. 

  • A place to defecate: originally specifically a latrine or outhouse but now used for any toilet. 

  • An act or instance of defecation. 

  • A little elevated spot or clump of earth, roots, and grass, in a marsh or swamp. 

  • An area of decayed vegetation (particularly sphagnum moss) which forms a wet spongy ground too soft for walking; a marsh or swamp. 

verb
  • To make a mess of something. 

  • To be prevented or impeded from making progress, to become stuck. 

  • To sink or submerge someone or something into bogland. 

  • To prevent or slow someone or something from making progress. 

  • To defecate, to void one's bowels. 

  • To cover or spray with excrement. 

  • To sink and stick in bogland. 

  • To go away. 

bogle

noun
  • A goblin; a frightful spectre or phantom; a bogy or bugbear. 

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