footslog vs yomp

footslog

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

noun
  • An instance of footslogging. 

yomp

verb
  • To make a strenuous long-distance march. 

noun
  • A long-distance march carrying full kit. 

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