but and ben vs youth hostel

but and ben

noun
  • A two-roomed cottage; a small house or shack 

adv
  • In the inner and outer parts of a building 

youth hostel

noun
  • An inexpensive supervised lodging place, primarily for young people. 

How often have the words but and ben and youth hostel occurred in a corpus of books? (source: Google Ngram Viewer )