bivy vs shanty

bivy

verb
  • To camp in a bivouac. 

noun
  • A bivouac sack. 

shanty

verb
  • To inhabit a shanty. 

noun
  • A rudimentary or improvised dwelling, especially one not legally owned. 

  • An unlicensed pub. 

  • A song a sailor sings, especially in rhythm to his work. 

  • A roughly-built hut or cabin. 

adj
  • Jaunty; showy. 

  • Living in shanties; poor, ill-mannered and violent. 

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