impersonal vs objective case

impersonal

noun
  • An impersonal word or construct. 

adj
  • Lacking warmth or emotion; cold. 

  • Not having a subject, or having a third person pronoun without an antecedent. 

  • Not personal; not representing a person; not having personality. 

objective case

noun
  • the form of a noun or pronoun used as the object of a verb or a preposition. 

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