concrete vs opinion

concrete

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

  • 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. 

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). 

opinion

noun
  • A belief, judgment or perspective that a person has formed, either through objective or subjective reasoning, about a topic, issue, person or thing. 

  • a judicial opinion delivered by an Advocate General to the European Court of Justice where he or she proposes a legal solution to the cases for which the court is responsible 

  • The formal decision, or expression of views, of a judge, an umpire, a doctor, or other party officially called upon to consider and decide upon a matter or point submitted. 

  • The judgment or sentiment which the mind forms of persons or things; estimation. 

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