chucklehead vs dingleberry

chucklehead

noun
  • A stupid or clumsy person. 

  • A coastal rockfish of California, Sebastes chlorostictus. 

dingleberry

noun
  • A stupid or foolish person. 

  • Vaccinium erythrocarpum, the southern mountain cranberry. 

  • Dried fecal matter adhering to anal hair. 

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