firmness vs hesitancy

firmness

noun
  • security; steadfastness; good grip 

  • strictness; mental strength 

  • physical durability; rigidness (of material) 

hesitancy

noun
  • A pausing or halting before beginning a task, often as a result of some fear or uncertainty about the outcome. 

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