FUBAR vs clusterball

FUBAR

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

clusterball

noun
  • Synonym of clusterfuck. 

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