acerbity vs affection

acerbity

noun
  • Something harsh (e.g. a remark, act or experience). 

  • Harshness, bitterness, or severity 

  • Sourness of taste, with bitterness and astringency, like that of unripe fruit. 

affection

noun
  • 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. 

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

  • A feeling of love or strong attachment. 

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