established vs official

established

adj
  • Of a religion, church etc.: formally recognized by a state as being official within that area. 

  • Explicitly defined, described or recognized as a reference. 

  • Having been in existence for a long time and therefore recognized and generally accepted. 

official

adj
  • Relating to an ecclesiastical judge appointed by a bishop, chapter, archdeacon, etc., with charge of the spiritual jurisdiction. 

  • Discharging an office or function. 

  • Relating to an office; especially, to a subordinate executive officer or attendant. 

  • True, real, beyond doubt. 

  • Approved by authority; authorized. 

  • Of or pertaining to an office or public trust. 

  • Derived from the proper office or officer, or from the proper authority; made or communicated by virtue of authority 

  • Dubious but recognized by authorities as truth and/or canon. 

  • Listed in a national pharmacopeia. 

  • Sanctioned by the pharmacopoeia; appointed to be used in medicine; officinal. 

noun
  • An office holder, a person holding an official position in government, sports, or other organization. 

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