hot seat vs hot water

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. 

hot water

noun
  • A dangerous situation; trouble. 

  • fierce criticism 

  • Used other than figuratively or idiomatically: see hot, water. 

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