cool cat vs impersonal

cool cat

noun
  • An individual who is at ease and self-assured; one who is calm and composed in interactions with others. 

  • A person who performs or appreciates jazz, especially one whose style of speech and movement is relaxed and rhythmic. 

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. 

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