stretch one's legs vs stroll

stretch one's legs

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

stroll

verb
  • To wander on foot; to ramble idly or leisurely; to rove. 

  • To walk the streets as a prostitute. 

  • To go somewhere with ease. 

  • To do, obtain, or achieve something in a casual and effortless way. 

noun
  • A wandering on foot; an idle and leisurely walk; a ramble. 

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