comfortable vs sound as a barrel

comfortable

adj
  • Confident; relaxed; not worried about someone or something. 

  • Amply sufficient, satisfactory. 

  • In a state of comfort and content. 

  • Providing physical comfort and ease; agreeable. 

noun
  • A stuffed or quilted coverlet for a bed; a comforter. 

sound as a barrel

adj
  • healthy, enjoying good health 

How often have the words comfortable and sound as a barrel occurred in a corpus of books? (source: Google Ngram Viewer )