preserve vs strangle

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. 

strangle

verb
  • To stifle or suppress. 

  • To kill someone by squeezing the throat so as to cut off the oxygen supply; to choke, suffocate or throttle. 

  • To be stifled, choked, or suffocated in any manner. 

  • To be killed by strangulation, or become strangled. 

noun
  • A trading strategy using options, constructed through taking equal positions in a put and a call with different strike prices, such that there is a payoff if the underlying asset's value moves beyond the range of the two strike prices. 

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