pep talk vs philippic

pep talk

noun
  • A rallying speech made to instill enthusiasm and boost confidence 

philippic

noun
  • Any tirade or declamation full of bitter condemnation. 

  • Any of the discourses of Demosthenes against Philip II of Macedon, defending the liberty of Athens. 

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