preserve vs relegate

preserve

verb
  • To protect; to keep from harm or injury. 

  • 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. 

noun
  • An activity with restricted access. 

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

  • A reservation, a nature preserve. 

relegate

verb
  • Exile or banish to a particular place. 

  • Assign (a thing) to an appropriate place or situation based on appraisal or classification. 

  • Remove or send to a place far away. 

  • Submit (something) to someone else for appropriate action thereby; compare delegate. 

  • Consign (a person or thing) to a place, position, or role of obscurity, insignificance, oblivion, lower rank or (especially) inferiority. 

  • Refer (a point of contention) to an authority in deference to the judgment thereof. 

  • Transfer (a sports team) to a lower-ranking league division. 

  • Banish from proximity to Rome for a set time; compare relegate. 

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