absenteeism vs no-call-no-show

absenteeism

noun
  • The state of being absent, especially frequently or without good reason; the practice of an absentee. 

  • The practice of absenting oneself from the country or district where one's estate is situated. 

no-call-no-show

noun
  • An unexplained absence from work, usually grounds for discipline, where the employee does not alert the employer of their absence ahead of time nor during the scheduled shift. 

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