detention centre vs pokey

detention centre

noun
  • A facility in which people are detained (held in custody); a jail. 

  • An immigration detention facility; a facility in which people who have attempted to enter Australia without prior authorisation are detained, pending a decision on whether they are to be accepted as refugees or returned to their country of origin. 

  • A concentration camp. 

pokey

noun
  • prison. 

  • knife. 

adj
  • slow 

  • fast 

  • of small volume, cramped 

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