blunderhead vs spaz

blunderhead

noun
  • Someone who habitually makes mistakes or blunders 

spaz

noun
  • A stupid or incompetent person. 

  • A person with spastic paralysis or spastic cerebral palsy or epilepsy 

  • A tantrum, a fit. 

  • A hyperactive person. 

verb
  • To have a tantrum or fit. 

  • To malfunction, go on the fritz. 

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