no-show vs vacancy

no-show

noun
  • An absence; failure to show up or to make a scheduled appearance, especially at a hotel or a place of employment. 

  • A person or group that does not show up. 

verb
  • To fail to show up for something. 

vacancy

noun
  • An unoccupied position or job. 

  • Empty space. 

  • An available room in a hotel; guest house, etc. 

  • Lack of intelligence or understanding. 

  • A blank mind, unoccupied with thought. 

  • A defect in a crystal caused by the absence of an atom in a lattice 

How often have the words no-show and vacancy occurred in a corpus of books? (source: Google Ngram Viewer )