bone in the throat vs impediment

bone in the throat

noun
  • A source of continuing annoyance; a hindrance. 

impediment

noun
  • A hindrance; that which impedes or obstructs progress. 

  • Baggage, especially that of an army; impedimenta. 

  • A disability, especially one affecting the hearing or speech. 

How often have the words bone in the throat and impediment occurred in a corpus of books? (source: Google Ngram Viewer )