frigid vs igneous

frigid

adj
  • Chilly in manner; lacking affection or zeal; impassive. 

  • Sexually unresponsive, especially of a woman. 

  • Very cold; lacking warmth; icy. 

igneous

adj
  • Resulting from, or produced by, great heat. With rocks, it could also mean formed from lava or magma. 

  • Pertaining to or having the nature of fire; containing fire; resembling fire. 

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