ninnyhammer vs pigwidgeon

ninnyhammer

noun
  • a foolish person; a simpleton 

pigwidgeon

noun
  • A contemptible or stupid person or creature. 

  • A small or petty person, creature or object, especially a fairy, dwarf, imp, or elf. 

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