biff vs fiver

biff

noun
  • A sudden, sharp blow or punch. 

  • A wipeout. 

intj
  • The sound of a person being punched or hit. 

verb
  • To discard; to throw out; to throw away. 

  • To punch or hit. 

  • To wipe out; to faceplant; to fall. 

fiver

noun
  • A clenched fist. 

  • A mathematical puzzle played on a 5 × 5 grid. 

  • A person who gives five percent of their income or five hours a week of their time to charity (a reduction of ten percent tithing). 

  • A Zaydi Shiite Muslim, who disagrees with the majority of Shiites on the identity of the Fifth Imam. 

  • A banknote with a value of five units of currency. 

  • The value in money that this represents. 

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