cucumber vs muskmelon

cucumber

noun
  • The edible fruit of this plant, having a green rind and crisp white flesh. 

  • A vine in the gourd family, Cucumis sativus. 

  • A person who is calm and self-possessed. 

muskmelon

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

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