deprecate vs showboat

deprecate

verb
  • To declare something obsolescent; to recommend against a function, technique, command, etc. that still works but has been replaced. 

  • To belittle or express disapproval of. 

showboat

noun
  • A river steamboat having a resident theatre. 

  • A showoff. 

verb
  • To show off. 

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