chowderhead vs dingleberry

chowderhead

noun
  • An idiot; a dummy. 

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 chowderhead and dingleberry occurred in a corpus of books? (source: Google Ngram Viewer )