moonraker vs topgallant

moonraker

noun
  • A small, light sail located high on a mast (above the skysail) and used for speed. 

  • Someone from Wiltshire. 

topgallant

noun
  • The sail suspended from the topmost section of a mast. 

  • The topmost section of a mast; topgallant mast. 

  • Anything elevated or splendid. 

adj
  • Situated above the topmast and below the royal mast. 

  • Of the most superior quality; the best of its kind. 

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