content vs know

content

verb
  • To give contentment or satisfaction; to satisfy; to make happy. 

noun
  • That which contents or satisfies; that which if attained would make one happy. 

  • Satisfaction, contentment; pleasure. 

  • An expression of assent to a bill or motion; an affirmative vote. 

  • That which is contained. 

  • The amount of material contained; contents. 

  • The n-dimensional space contained by an n-dimensional polytope (called volume in the case of a polyhedron and area in the case of a polygon); length, area or volume, generalized to an arbitrary number of dimensions. 

  • The greatest common divisor of the coefficients; (of a polynomial with coefficients in an integral domain) the common factor of the coefficients which, when removed, leaves the adjusted coefficients with no common factor that is noninvertible. 

  • Subject matter; semantic information (or a portion or body thereof); that which is contained in writing, speech, video, etc. 

  • A member who votes in assent. 

adj
  • Satisfied, pleased, contented. 

know

verb
  • To be or become aware or cognizant. 

  • 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 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. 

noun
  • Knowledge; the state of knowing. 

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

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