quiff vs tunnel of love

quiff

noun
  • The vulva or vagina. 

  • A young girl, especially as promiscuous; a prostitute. 

  • A puff or whiff, especially of tobacco smoke. 

  • A trick or ploy; a stratagem. 

  • A hairstyle whereby the forelock is brushed and/or gelled upward, often associated with the styles of the 1950s. 

verb
  • To arrange (the hair) in such a manner. 

tunnel of love

noun
  • The vagina. 

  • A carnival dark ride for couples in boats, either relaxing and romantic, or spooky (encouraging the couple to cling to one another). 

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