nail-biting vs uncomfortable

nail-biting

adj
  • That causes nervous anticipation or suspense 

uncomfortable

adj
  • Uneasy or anxious. 

  • Experiencing discomfort. 

  • Not comfortable; causing discomfort. 

  • Put off or disgusted. 

How often have the words nail-biting and uncomfortable occurred in a corpus of books? (source: Google Ngram Viewer )