f vs tom tit

f

noun
  • fuck 

  • Folio, paper and book size (10"-12.5" x 15"-20") 

character
  • The sixth letter of the English alphabet, called ef and written in the Latin script. 

symbol
  • The name of the fourth tone of the model scale, or scale of C. F sharp (F♯) is a tone intermediate between F and G. 

tom tit

noun
  • a shit 

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