brush off vs preserve

brush off

verb
  • Used other than figuratively or idiomatically: see brush, off. To remove something with a brush. 

  • To disregard (something), to dismiss or ignore (someone), as unimportant. 

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 brush off and preserve occurred in a corpus of books? (source: Google Ngram Viewer )