commissariat vs solids

commissariat

noun
  • A supply of food. 

  • A department of the government of the Soviet Union in the early period of its existence. 

  • The department of an army that supplies provisions for the troops. 

  • A territorial and governmental unit of Colombia at some points in its history. 

solids

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