muskmelon vs winter melon

muskmelon

noun
  • A type of melon, Cucumis melo subsp. melo, with sweet orange flesh and a rough skin resembling netting. 

winter melon

noun
  • A green, fuzzy melon fruit with sweet white flesh, which grows on this vine. 

  • A vine of the species Benincasa hispida cultivated throughout Asia. 

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