sociable vs unofficial

sociable

adj
  • Tending to socialize or be social. 

  • Offering opportunities for conversation; characterized by much conversation. 

noun
  • A four-wheeled open carriage with seats facing each other. 

  • A couch with a curved S-shaped back. 

  • An informal party or church meeting for purposes of socializing. 

  • A bicycle or tricycle for two persons side by side. 

  • A sociable person. 

unofficial

adj
  • Not officially established. 

  • Not acting with official authority. 

  • Implicitly true but withheld and/or contradicted by authority. 

  • Not listed in a national pharmacopeia etc. 

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