jettison vs preserve

jettison

noun
  • The action of jettisoning items. 

  • Items that have been or are about to be ejected from a boat or balloon. 

verb
  • To eject from a boat, submarine, aircraft, spaceship or hot-air balloon, so as to lighten the load. 

  • To let go or get rid of as being useless or defective. 

preserve

noun
  • An activity with restricted access. 

  • A sweet spread made of any of a variety of fruits. 

  • A reservation, a nature preserve. 

verb
  • To save from decay by the use of some preservative substance, such as sugar or salt; to season and prepare (fruits, meat, etc.) for storage. 

  • To maintain throughout; to keep intact. 

  • To protect; to keep from harm or injury. 

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