difficulty vs hot seat

difficulty

noun
  • An awkward situation or quarrel. 

  • Physical danger from the environment, especially with risk of drowning 

  • An obstacle that hinders achievement of a goal. 

  • The state of being difficult, or hard to do. 

  • An objection. 

  • That which cannot be easily understood or believed. 

hot seat

noun
  • Any stressful situation. 

  • The seat occupied by a game show contestant at a stage where they are answering questions alone. 

  • The electric chair. 

  • A multiplayer game mode where the players take turns playing the game. 

How often have the words difficulty and hot seat occurred in a corpus of books? (source: Google Ngram Viewer )