FUBAR vs clusterfuck

FUBAR

adj
  • Fucked up (or, bowdlerized, fouled up) beyond all recognition (or beyond all repair, or beyond all reason, or beyond any recovery). 

clusterfuck

verb
  • To fuck (something) up, to make a total mess of. 

noun
  • A chaotic situation where everything seems to go wrong. It is often caused by incompetence, communication failure, or a complex environment. 

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