parachutist vs paratrooper

parachutist

noun
  • Someone who jumps from an aircraft using a parachute, especially as a sport. 

paratrooper

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

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