het vs thermic

het

adj
  • Heated. 

  • heterozygous 

  • Heterosexual. 

noun
  • A heterosexual person. 

  • Fan fiction based on celebrities or fictional characters involved in an opposite-sex romantic and/or sexual relationship. 

  • heterozygote 

thermic

adj
  • Of, related to, or associated with heat; thermal. 

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