magnetism vs wattage

magnetism

noun
  • The science which treats of magnetic phenomena. 

  • The property of being magnetic. 

  • Animal magnetism. 

  • Power of attraction; power to excite the feelings and to gain the affections. 

wattage

noun
  • An amount or power (especially electric), expressed in watts, kilowatts etc. 

  • The power requirement of some electric appliance. 

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