limitation vs worm in the apple

limitation

noun
  • An imperfection or shortcoming that limits something's use or value. 

  • The act of limiting or the state of being limited. 

  • A time period after which some legal action may no longer be brought. 

  • A restriction; a boundary, real or metaphorical, caused by some thing or some circumstance. 

worm in the apple

noun
  • A serious flaw in something otherwise good; a problem that ruins everything else. 

How often have the words limitation and worm in the apple occurred in a corpus of books? (source: Google Ngram Viewer )