deprecate vs do down

deprecate

verb
  • To belittle or express disapproval of. 

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

do down

verb
  • To belittle or intimidate 

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