precaution vs protectability

precaution

noun
  • Previous caution or care; caution previously employed to prevent misfortune or to secure good 

  • A measure taken beforehand to ward off evil or secure good or success; a precautionary act. 

verb
  • To warn or caution beforehand. 

  • To take precaution against. 

protectability

noun
  • The ability to receive protection. 

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