guesthouse vs room and board

guesthouse

noun
  • A private house offering accommodation to paying guests; a boarding house; a bed and breakfast. 

  • A small house near a main house, for lodging visitors. 

room and board

noun
  • A place of lodging with daily meals, usually provided in return for rent or other considerations. 

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