footslog vs stretch one's legs

footslog

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

noun
  • An instance of footslogging. 

stretch one's legs

verb
  • To walk about, especially after prolonged time sitting or lying down. 

How often have the words footslog and stretch one's legs occurred in a corpus of books? (source: Google Ngram Viewer )