bed and breakfast vs bed-and-breakfast

bed and breakfast

noun
  • A score of 26, made up of a score of 20, 1 and 5 in any order. 

  • A private home, guesthouse, etc. where guests are provided overnight accommodations and served breakfast but usually no other meals. 

bed-and-breakfast

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