chayote vs winter melon

chayote

noun
  • The fruit of this plant. 

  • Sechium edule, a tropical American perennial herbaceous vine having tendrils, tuberous roots, and a green, pear-shaped fruit cooked as a vegetable. 

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 chayote and winter melon occurred in a corpus of books? (source: Google Ngram Viewer )