know vs phenomenon

know

noun
  • Knowledge; the state of knowing. 

  • Knowledge; the state of knowing; now confined to the fixed phrase ‘in the know’ 

verb
  • To perceive the truth or factuality of; to be certain of or that. 

  • To experience. 

  • To understand or have a grasp of through experience or study. 

  • To be or become aware or cognizant. 

  • To be able to play or perform (a song or other piece of music). 

  • To be acquainted or familiar with; to have encountered. 

  • To be aware of; to be cognizant of. 

  • To recognize as the same (as someone or something previously encountered) after an absence or change. 

  • To have knowledge; to have information, be informed. 

phenomenon

noun
  • A thing or being, event or process, perceptible through senses; or a fact or occurrence thereof. 

  • An experienced object whose constitution reflects the order and conceptual structure imposed upon it by the human mind (especially by the powers of perception and understanding). 

  • A knowable thing or event (eg by inference, especially in science) 

  • A kind or type of phenomenon (sense 1 or 2) 

  • A fact or event considered very unusual, curious, or astonishing by those who witness it. 

  • A wonderful or very remarkable person or thing. 

  • Appearance; a perceptible aspect of something that is mutable. 

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