at sea vs mystified

at sea

prep
  • Used other than figuratively or idiomatically: see at, sea. 

  • In a state of confusion or bewilderment. 

mystified

adj
  • puzzled or confused 

  • state of enchantment as concerns person or event 

How often have the words at sea and mystified occurred in a corpus of books? (source: Google Ngram Viewer )