engage vs retire

engage

verb
  • To attract, to please; (archaic) to fascinate or win over (someone). 

  • To enter into conflict with (an enemy). 

  • To come into gear with. 

  • To enter into (an activity), to participate (construed with in). 

  • To draw into conversation. 

  • To mesh or interlock (of machinery, especially a clutch). 

  • To guarantee or promise (to do something). 

  • To engross or hold the attention of; to keep busy or occupied. 

  • To arrange to employ or use (a worker, a space, etc.). 

  • To bind through legal or moral obligation (to do something, especially to marry) (usually in passive). 

  • To enter into battle. 

retire

verb
  • To retreat from action or danger; to withdraw for safety or pleasure. 

  • To stop working on a permanent basis, usually because of old age or illness. 

  • To cease use or production of something. 

  • To go back or return; to withdraw or retreat, especially from public view; to go into privacy. 

  • To fit (a vehicle) with new tires. 

  • To recede; to fall or bend back. 

  • To go to bed. 

  • To withdraw; to take away. 

  • To voluntarily stop batting before being dismissed so that the next batsman can bat. 

  • To withdraw from circulation, or from the market; to take up and pay. 

  • To cause to retire; specifically, to designate as no longer qualified for active service; to place on the retired list. 

  • To make a play which results in a runner or the batter being out, either by means of a put out, fly out or strikeout. 

noun
  • The act of retiring, or the state of being retired. 

  • A place to which one retires. 

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