estimation vs mana

estimation

noun
  • The process of making an estimate. 

  • The amount, extent, position, size, or value reached in an estimate. 

  • Esteem or favourable regard. 

mana

noun
  • Magical power. 

  • Power, prestige; specifically, a form of supernatural energy in Polynesian religion that inheres in things or people. 

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