dod vs dodd

dod

noun
  • sulk, huff 

  • lump 

verb
  • to cut off, as wool from sheep's tails, or horns from a cattle; to lop or clip off 

dodd

noun
  • A rounded summit of a hill; a lower summit or shoulder to a hill 

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