f vs ish

f

noun
  • fuck 

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

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. 

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

ish

noun
  • Shit. 

  • The letter which stands for the sh sound /ʃ/ in Pitman shorthand. 

adv
  • about, approximately 

  • somewhat, reasonably, fairly 

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