emotion vs tenderness

emotion

noun
  • A person's internal state of being and involuntary physiological response to an object or a situation, based on or tied to physical state and sensory data. 

  • A reaction by a non-human organism with behavioral and physiological elements similar to a person's response. 

tenderness

noun
  • concern for the feelings or welfare of others 

  • pain or discomfort when an affected area is touched 

  • a tendency to express warm, compassionate feelings 

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