affection vs trigger point

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. 

trigger point

noun
  • An event, arrangement, provocation, etc. that leads a certain, generally violent or angered, action to be taken. 

  • A hyperirritable spot in the skeletal muscle; a point in tender muscle that tends to elicit pain upon pressure or touch. ᵂᵖ 

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