comfort vs shot in the arm

comfort

noun
  • A cause of relief or satisfaction. 

  • Something that offers comfort. 

  • A consolation; something relieving suffering or worry. 

  • Contentment, ease. 

verb
  • To relieve the distress or suffering of; to provide comfort to. 

  • To make comfortable. 

shot in the arm

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

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

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