commando vs paratrooper

commando

noun
  • A commando trooper. 

  • A small fighting force specially trained for making quick destructive raids against enemy-held areas. 

  • An organized force of Boer troops in South Africa; a raid by such troops. 

paratrooper

noun
  • A type of soldier who is trained to enter combat zones by parachuting from aircraft. 

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