boofhead vs caput

boofhead

noun

  • An oversized head. 

  • An idiot; a fathead. 

  • A person with an oversized head. 

adj

  • Fatheaded; stupid; dimwitted. 

caput

noun

  • The head. 

  • A knob-like protuberance or capitulum. 

  • The top or superior part of a thing. 

  • The council or ruling body of the University of Cambridge prior to the constitution of 1856. 

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