nob vs watermelon

nob

noun
  • A wealthy or influential person; a toff. 

  • The glans penis, the sensitive bulbous structure at the end of the penis also known as the head of the penis. (Also spelled knob.) 

  • A jack of the same suit as the card turned up by the dealer. (See also nibs.) 

  • The head. 

  • (vulgar, slang, chiefly UK) The penis; dick. (Also spelled knob.) 

  • A contemptible person; dick. (Also spelled knob.) 

verb
  • To hit in the head 

watermelon

noun
  • An environmentalist with socialist leanings. 

  • A pinkish-red colour, like that of watermelon flesh (also called watermelon pink). 

  • A project that is presented as on schedule when it actually has parts that are falling behind. 

  • The fruit of the watermelon plant, having a green rind and watery flesh that is typically bright red when ripe and contains black pips. 

  • A plant of the species Citrullus lanatus, bearing a melon-like fruit. 

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