retirement vs shelter

retirement

noun
  • The state of being retired; seclusion. 

  • An act of retiring; withdrawal. 

  • The state of having permanently left one's employment, now especially at reaching pensionable age; the portion of one's life after retiring from one's career. 

  • The act of leaving one's career or employment permanently. 

shelter

noun
  • An institution that provides temporary housing for homeless people, battered women, etc. 

  • A refuge, haven or other cover or protection from something. 

verb
  • To take cover. 

  • To provide cover from damage or harassment; to shield; to protect. 

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