bun vs spiff

bun

verb
  • To shoot. 

  • To form (the hair) into a bun. 

  • To smoke cannabis. 

noun
  • A tight roll of hair worn at the back of the head. 

  • A drunken spree. 

  • The vagina. 

  • A newbie. 

  • A Korean unit of length equivalent to about 0.3 cm. 

  • marijuana cigarette, joint 

  • A small bread roll, often sweetened or spiced. 

  • A cupcake. 

  • A buttock. 

spiff

verb
  • To throw; to heave. 

  • To reward (a salesperson) with a spiff or bonus. 

  • (usually with up or out) To make spiffy (attractive, polished, or up-to-date) 

  • To attach a spiff or bonus to the selling of (a product) 

noun
  • Attractiveness or charm in dress, appearance, or manner. 

  • A bonus or other remuneration, given for reaching a sales goal or promoting the goods of a particular manufacturer. Originally from textile retailing, a percentage given for selling off surplus or out-of-fashion stock, of which the sales person could offer part as a discount to a customer. 

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