fib vs figment of one's imagination

fib

noun
  • The fibula. 

  • A liar. 

  • A kind of experimental poem where the number of syllables in each line is the next succeeding Fibonacci number. 

  • A lie, especially one that is more or less inconsequential. 

verb
  • To lie, especially more or less inconsequentially. 

figment of one's imagination

noun
  • A product of the imagination. 

How often have the words fib and figment of one's imagination occurred in a corpus of books? (source: Google Ngram Viewer )