concoction vs separation

concoction

noun
  • A mixture prepared in such a way. 

  • The preparing of a medicine, food or other substance out of many ingredients. 

  • Something made up, an invention. 

separation

noun
  • Departure from active duty, while not necessarily leaving the service entirely. 

  • An agreement legalizing such an arrangement. 

  • An object that separates two spaces. 

  • The act of disuniting two or more things, or the condition of being separated. 

  • The act or condition of two or more people being separated from one another. 

  • The place at which a division occurs. 

  • An interval, gap or space that separates things or people. 

  • The act or condition of a married couple living in separate homes while remaining legally married. 

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