dripstone vs hovel

dripstone

noun
  • A protective moulding over a door or window that allows rain to drip away from the structure. 

  • Stalactites and stalagmites collectively. 

  • A water filter in which impurities are removed by running water through a porous stone. 

hovel

noun
  • An open shed for sheltering cattle, or protecting produce, etc., from the weather. 

  • A poor cottage; a small, mean house; a hut. 

  • In the manufacture of porcelain, a large, conical brick structure around which the firing kilns are grouped. 

verb
  • To construct a chimney so as to prevent smoking, by making two of the more exposed walls higher than the others, or making an opening on one side near the top. 

  • To put in a hovel; to shelter. 

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