aesthetics vs doctrine

aesthetics

noun
  • The study or philosophy of beauty. 

  • An artist's principles, preferences, and/or his agenda 

doctrine

noun
  • A belief or tenet, especially about philosophical or theological matters. 

  • A self-imposed policy governing some aspect of a country's foreign relations, especially regarding what sort of behavior it will or will not tolerate from other countries. 

  • The body of teachings of an ideology, most often a religion, or of an ideological or religious leader, organization, group, or text. 

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