covertness vs hiding

covertness

noun
  • The characteristic of being covert. 

hiding

noun
  • A state of concealment. 

  • A place of concealment. 

  • A beating or spanking. 

  • Skinning (of an animal) to yield a hide (for human use). 

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