Cobbler vs footslog

Cobbler

noun
  • A person from Northamptonshire (traditionally a centre for shoemaking) 

footslog

noun
  • An instance of footslogging. 

verb
  • to walk heavily over a long distance or in a weary manner; to trudge 

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