criticism vs shot in the arm

criticism

noun
  • The act of criticising; a critical judgment passed or expressed 

  • A critical observation or detailed examination and review. 

shot in the arm

noun
  • An injection of a drug into the arm, whether for medical or recreational purposes. 

  • A stimulus; a boost in energy, morale, or well-being. 

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