configurational vs formational

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. 

formational

adj
  • Of or pertaining to formation (in any of many contexts). 

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