boarding house vs shelter

boarding house

noun
  • A private house in which paying residents are provided with accommodation and meals. 

  • A boarding school building where boarders live during term time. 

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 boarding house and shelter occurred in a corpus of books? (source: Google Ngram Viewer )