chancellor vs director general

chancellor

noun
  • A senior secretary or official with administrative or legal duties, sometimes in charge of some area of government such as finance or justice. 

  • The head of a university, sometimes purely ceremonial. 

  • The chief judge of a court of chancery (that is, one exercising equity jurisdiction). 

  • The head of the government in some German-speaking countries. 

  • A senior record keeper of a cathedral; a senior legal officer for a bishop or diocese in charge of hearing cases involving ecclesiastical law. 

  • The foreman of a jury. 

director general

noun
  • The highest executive officer within a governmental, statutory, NGO, third sector or not-for-profit institution. In reference to government, the executive officer below the minister of the department. 

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