perfervid vs superheated

perfervid

adj
  • Extremely, excessively, or feverishly passionate; zealous. 

superheated

adj
  • exceedingly intense or emotional 

  • Heated above the boiling point 

  • heated above the critical point 

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