pierrot vs punchinello

pierrot

noun
  • Any of various lycaenid butterflies of the genera Tarucus and Castalia, notable for white contrasting with brown or black on the underwings. 

  • An 18th-century women's low-cut basque with sleeves. 

punchinello

noun
  • A small brown butterfly, Zemeros flegyas, family Riodinidae, of Asia. 

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