method vs modus operandi

method

noun
  • A process by which a task is completed; a way of doing something (followed by the adposition of, to or for before the purpose of the process). 

  • A technique for acting based on the ideas articulated by Konstantin Stanislavski and focusing on authentically experiencing the inner life of the character being portrayed. 

  • A subroutine or function belonging to a class or object. 

  • Marijuana. 

verb
  • To apply particular treatment methods to (a mold). 

  • To apply a method to. 

modus operandi

noun
  • A person or thing's normal mode of operation. 

  • A known criminal's established habits and mode of work when committing specific offences, especially fraud, matched with characteristics of an unsolved crime to narrow down (limit to a specific list) or profile suspects. 

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