RAP vs warning

RAP

intj
  • Used when something happens to serve someone right (Deliberate misspelling of RIP) 

noun
  • recognized air picture 

warning

intj
  • Used to warn of danger in signs and notices. 

noun
  • Something spoken or written that is intended to warn. 

  • The action of the verb warn; an instance of warning someone. 

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