angularity vs firmness

angularity

noun
  • The property or characteristic of possessing angles. 

  • A stiff, cranky, crotchety manner or behaviour. 

  • A sharp point or angle. 

firmness

noun
  • physical durability; rigidness (of material) 

  • security; steadfastness; good grip 

  • strictness; mental strength 

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