pigwidgeon vs poor thing

pigwidgeon

noun
  • A contemptible or stupid person or creature. 

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

poor thing

noun
  • Someone or something to be pitied 

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