concrete vs knowledge

concrete

noun
  • An extract of herbal materials that has a semi-solid consistency, especially when such materials are partly aromatic. 

  • Specifically, a building material created by mixing cement, water, and aggregate such as gravel and sand. 

  • Sugar boiled down from cane juice to a solid mass. 

  • A dessert of frozen custard with various toppings. 

  • A term designating both a quality and the subject in which it exists; a concrete term. 

adj
  • Made of concrete, a building material. 

  • Being or applying to actual things, not abstract qualities or categories. 

  • Real, actual, tangible. 

  • Particular, specific, rather than general. 

  • United by coalescence of separate particles, or liquid, into one mass or solid. 

verb
  • To solidify: to change from being abstract to being concrete (actual, real). 

  • To cover with or encase in concrete (building material). 

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 concrete and knowledge occurred in a corpus of books? (source: Google Ngram Viewer )