configurational vs structural

configurational

adj
  • Of or pertaining to a configuration. 

  • Of a language: having a relatively fixed style of grammar where the subject of a sentence is outside the finite verb phrase but the object is inside it. 

structural

adj
  • Of, relating to, or having structure. 

  • That is lasting. economics 

  • Involving the mechanics of construction. 

noun
  • Structural steel, used in construction. 

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