construction vs obscurity

construction

noun
  • The meaning or interpretation of a text, action etc.; the way something is viewed by an observer or onlooker. 

  • The process of constructing. 

  • The trade of building structures. 

  • Anything that has been constructed. 

  • A geometric figure of arcs and line segments that is drawable with a straightedge and compass. 

  • A group of words arranged to form a meaningful phrase. 

  • A (usually non-representational) structure, such as a collage etc. 

  • A building, model or some other structure. 

  • The manner in which something is built. 

  • The act or result of construing the meaning of something. 

obscurity

noun
  • The state of being unknown; a thing that is unknown. 

  • The quality of being difficult to understand; a thing that is difficult to understand. 

  • Darkness; the absence of light. 

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