firmness vs procrastination

firmness

noun
  • security; steadfastness; good grip 

  • strictness; mental strength 

  • physical durability; rigidness (of material) 

procrastination

noun
  • The act of postponing, delaying or putting off, especially habitually or intentionally. 

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