hogshead vs kilderkin

hogshead

noun
  • An English measure of capacity for liquids, containing 63 wine gallons, or about 52+¹⁄₂ imperial gallons; a half pipe. 

  • A large barrel or cask of indefinite contents, especially one containing from 100 to 140 gallons. 

kilderkin

noun
  • An old English liquid measure, usually being half a barrel; containing 18 English beer gallons, or 83.178 L. 

  • A small barrel. 

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