potent vs pulling no punches

potent

adj
  • Able to procreate. 

  • Very powerful or effective. 

  • Having a sharp or offensive taste. 

  • Possessing strength. 

  • Powerfully effective. 

noun
  • A heraldic fur formed by a regular tessellation of blue and white T shapes. 

pulling no punches

How often have the words potent and pulling no punches occurred in a corpus of books? (source: Google Ngram Viewer )