insociable vs unsociable

insociable

adj

  • Not sociable or companionable. 

unsociable

adj

  • unfriendly 

  • not congenial or compatible 

  • not desiring the company of others 

noun

  • A person who is not sociable. 

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