larn vs learn the ropes

larn

verb
  • To learn. 

  • Larn yersel te taalk propa like! 

  • To teach. 

learn the ropes

verb
  • To learn the basics or master introductory knowledge. 

  • To learn some skill requiring specialist knowledge. 

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