Maltese cross vs nonpareil

Maltese cross

noun
  • Synonym of Geneva wheel 

  • A cross having four equal arms resembling arrowheads joined at the points 

  • A flowering plant Lychnis chalcedonica (syn. Silene chalcedonica) of the family Caryophyllaceae 

  • A position on the rings where the gymnast's body is horizontal and straight, with arms to the side; a horizontal planche. 

nonpareil

noun
  • A person or thing that has no equal; a paragon. 

  • A small, flat chocolate drop covered with such pellets of sugar, similar to a comfit. 

  • The blue underwing or Clifden nonpareil (Catocala fraxini), a species of moth distributed across the Palearctic; also (obsolete) any of a number of moths of other species. 

  • A caper (“pickled edible flower bud”) of the smallest size. 

  • The painted bunting (Passerina ciris), a brightly-coloured finch native to North America. 

  • The size of type between ruby and emerald (or, in the United States, between agate and minion), standardized as 6-point; (countable) a slug of this size. 

adj
  • Unequalled, unrivalled; unique. 

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