cucumber vs papaya

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. 

papaya

noun
  • A tropical American evergreen tree, Carica papaya, having large, yellow, edible fruit 

  • An orange colour, like that of papaya flesh. 

  • The fruit of this tree. 

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