departure vs vacation

departure

noun
  • The act of departing or something that has departed. 

  • A deviation from a plan or procedure. 

  • There are several significant departures, however, from current practice. 

  • The distance due east or west made by a ship in its course reckoned in plane sailing as the product of the distance sailed and the sine of the angle made by the course with the meridian. 

  • The difference in easting between the two ends of a line or curve. 

  • The desertion by a party to any pleading of the ground taken by him in his last antecedent pleading, and the adoption of another 

  • A death. 

vacation

noun
  • The act of vacating something; moving out. 

  • A period during which official activity or business is formally suspended; an official holiday from university, law courts etc. 

  • Freedom from some business or activity. 

  • A holiday; a stretch of leisure time away from work or duty and devoted to rest or pleasure. 

  • An extended period of time away from work or school. 

  • The act of making legally void. 

verb
  • To spend or take a vacation. 

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