nourishment vs room and board

nourishment

noun
  • Something that nourishes; food 

  • The act of nourishing or the state of being nourished 

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 nourishment and room and board occurred in a corpus of books? (source: Google Ngram Viewer )