chalk out vs map out

chalk out

verb
  • to make (plans); to sketch 

  • Of a multi-race wager, to lose to the favorite in all of the remaining races. 

  • To draw or write down using chalk 

map out

verb
  • To organise a plan; to analyze a situation; to figure out a problem. 

  • To create a map of an area. 

  • To make explicit; to explain in detail. 

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