japan vs shellac

japan

noun
  • Lacquerware. 

  • A hard black enamel varnish containing asphalt. 

verb
  • To varnish with japan. 

shellac

noun
  • A processed secretion of the lac insect, Coccus lacca; used in polishes, varnishes etc. 

  • A beating; a thrashing. 

verb
  • To coat with shellac. 

  • To inflict a heavy defeat upon. 

  • To beat; to thrash. 

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