affection vs philia

affection

noun
  • An emotion; a feeling or natural impulse acting upon and swaying the mind. 

  • The act of affecting or acting upon. 

  • The state of being affected, especially: a change in, or alteration of, the emotional state of a person or other animal, caused by a subjective affect (a subjective feeling or emotion), which arises in response to a stimulus which may result from either thought or perception. 

  • An attribute; a quality or property; a condition. 

  • A feeling of love or strong attachment. 

philia

noun
  • a psychological disorder characterized by an irrational favorable disposition towards something 

  • liking 

  • friendship 

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