map out vs rough out

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. 

rough out

verb
  • To produce (a plan, diagram etc.) in rough. 

  • To create the rough shape of a sculpture from a large block of wood, stone, etc. 

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