honeydew melon vs white gourd

honeydew melon

noun
  • A melon from the Cucumis melo Inodorus cultivar group, with sweet, light green or white flesh and a smooth greenish-white or yellow rind. 

white gourd

noun
  • A green, fuzzy melon fruit taken from this vine that has sweet white flesh. 

  • A vine of the genus Benincasa cultivated throughout Asia. 

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