proceed vs retreat

proceed

verb
  • To move, pass, or go forward or onward; to advance; to carry on 

  • To come from; to have as its source or origin. 

  • To go on in an orderly or regulated manner; to begin and carry on a series of acts or measures; to act methodically 

  • To take an academic degree. 

  • To be applicable or effective; to be valid. 

  • To be transacted; to take place; to occur. 

  • To pass from one point, topic, or stage, to another. 

  • To begin and carry on a legal process. 

retreat

verb
  • To withdraw from a position, go back. 

  • To slope back. 

  • To withdraw military forces 

  • To shrink back due to generally warmer temperatures. 

  • a retreating forehead 

noun
  • A peaceful, quiet place affording privacy or security. 

  • The act of reversing direction and receding from a forward position. 

  • A bugle call or drumbeat signaling the lowering of the flag at sunset, as on a military base. 

  • A military ceremony to lower the flag. 

  • The move of a piece from a threatened position. 

  • A period of retirement, seclusion, or solitude. 

  • A period of meditation, prayer or study. 

  • The act of pulling back or withdrawing, as from something dangerous, or unpleasant. 

  • A signal for a military withdrawal. 

  • Withdrawal by military force from a dangerous position or from enemy attack. 

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