but and ben vs maisonette

but and ben

noun

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

adv

  • In the inner and outer parts of a building 

maisonette

noun

  • a small house 

  • an apartment often on two floors 

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