involve vs pull out

involve

verb
  • To complicate or make intricate. 

  • To take in; to gather in; to mingle, blend or merge. 

  • To cause or engage (someone or something) to participate or to become connected or implicated. 

  • To comprise or include; to have as a related part. 

  • To envelop, enfold, entangle. 

pull out

verb
  • To draw out or lengthen. 

  • To maneuver a vehicle from the side of a road onto the lane. 

  • To use coitus interruptus as a method of birth control. 

  • To remove something from a container. 

  • To withdraw; especially of military forces; to retreat. 

  • To transition from a dive to level or climbing flight. 

  • Used other than figuratively or idiomatically: see pull, out. 

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