fog vs knowledge

fog

noun
  • A silver deposit or other blur on a negative or developed photographic image. 

  • A new growth of grass appearing on a field that has been mowed or grazed. 

  • Distance fog. 

  • A state of mind characterized by lethargy and confusion. 

  • A mist or film clouding a surface. 

  • Tall and decaying grass left standing after the cutting or grazing season. 

  • A thick cloud that forms near the ground; the obscurity of such a cloud. (Compare mist, haze.) 

  • Moss. 

verb
  • To become obscured in condensation or water. 

  • To practice in a small or mean way; to pettifog. 

  • To cover with or as if with fog. 

  • To obscure in condensation or water. 

  • To make dim or obscure. 

  • To spoil (film) via exposure to light other than in the normal process of taking a photograph. 

  • To disperse insecticide into (a forest canopy) so as to collect organisms. 

  • To become dim or obscure. 

  • To make confusing or obscure. 

  • To pasture cattle on the fog (of), or aftergrass, of; to eat off the fog from (a field). 

  • To become covered with or as if with fog. 

  • To become covered with the kind of grass called fog. 

knowledge

noun
  • Sexual intimacy or intercourse (now usually in phrase carnal knowledge). 

  • Intellectual understanding; the state of appreciating truth or information. 

  • The fact of knowing about something; general understanding or familiarity with a subject, place, situation etc. 

  • Justified true belief 

  • The total of what is known; all information and products of learning. 

  • The deep familiarity with certain routes and places of interest required by taxicab drivers working in London, England. 

  • Awareness of a particular fact or situation; a state of having been informed or made aware of something. 

  • Something that can be known; a branch of learning; a piece of information; a science. 

  • Familiarity or understanding of a particular skill, branch of learning etc. 

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