coracle vs scow

coracle

noun
  • A small circular or oblong boat made of wickerwork and made watertight with hides or pitch, propelled and steered with a single paddle and light enough to be carried on a person's back. 

scow

noun
  • A large flat-bottomed boat, having broad, square ends. 

verb
  • To transport in a scow. 

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