caress vs have a thing

caress

verb
  • To affect as if with a caress. 

  • To touch or kiss lovingly; to fondle. 

noun
  • An act of endearment; any act or expression of affection; an embracing, or touching, with tenderness. 

  • A gentle stroking or rubbing. 

have a thing

verb
  • To have a crush on, or a soft spot for, someone. 

  • To be in a casual romantic relationship. 

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