objective vs raison d'être

objective

noun
  • a noun or pronoun in the objective case. 

  • The lens or lenses of a camera, microscope, or other optical device closest to the object being examined. 

  • A material object that physically exists. 

  • The objective case. 

  • A goal that is striven for. 

adj
  • Of or relating to a material object, actual existence or reality. 

  • Of, or relating to verbal conjugation that indicates the object (patient) of an action. (In linguistic descriptions of Tundra Nenets, among others.) 

  • Not influenced by the emotions or prejudices. 

  • Based on observed facts; without subjective assessment. 

  • Of, or relating to a noun or pronoun used as the object of a verb. 

raison d'être

noun
  • Reason for being. The claimed reason for the existence of something or someone; the sole or ultimate purpose of something or someone. 

How often have the words objective and raison d'être occurred in a corpus of books? (source: Google Ngram Viewer )