firmness vs modesty

firmness

noun
  • strictness; mental strength 

  • security; steadfastness; good grip 

  • physical durability; rigidness (of material) 

modesty

noun
  • The quality of being modest; having a limited and not overly high opinion of oneself and one's abilities. 

  • Moderate behaviour; reserve. 

  • Pudency, avoidance of sexual explicitness. 

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