come off vs pan out

come off

verb
  • To occur; to take place. 

  • To have some success; to succeed. 

  • To become detached. 

  • To appear; to seem; to project a certain quality. 

  • To escape or get off (lightly, etc.); to come out of a situation without significant harm. 

pan out

verb
  • To proceed according to plan; to result or end up. 

  • To separate and recover (valuable minerals) by swirling dirt or crushed rock in a pan of water, in the manner of a traditional prospector seeking gold. 

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