flash in the pan vs misstep

flash in the pan

noun
  • A career notable for early success not followed by significant accomplishment. 

  • A transient occurrence with no long-term effect. 

misstep

noun
  • An error or mistake. 

  • A step that is wrong, a false step. 

verb
  • To step badly or incorrectly. 

  • To make an error or mistake. 

How often have the words flash in the pan and misstep occurred in a corpus of books? (source: Google Ngram Viewer )