buccaneering vs plagiarism

buccaneering

noun
  • robbery on the high seas; piracy 

adj
  • bold, reckless and unscrupulous 

plagiarism

noun
  • The instance of plagiarism. 

  • Text or other work resulting from this act. 

  • Copying of another person's ideas, text, or other creative work, and presenting it as one's own, especially without permission; plagiarizing. 

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