chalk out vs formulate

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 

formulate

verb
  • To put into a clear and definite form of statement or expression. 

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