start out vs walk off

start out

verb
  • To emerge suddenly; to jump out. 

  • To be or become conspicuous; to stand out. 

  • To begin. 

walk off

verb
  • To flee or abandon. 

  • To measure a distance by walking, as by counting paces or extending a measuring tape or rope. 

  • To recover from (a minor injury) or digest (a large meal) by walking around. 

How often have the words start out and walk off occurred in a corpus of books? (source: Google Ngram Viewer )