floor-through vs tenement

floor-through

noun
  • An apartment which covers the entire depth of a building. 

tenement

noun
  • A building that is rented to multiple tenants, especially a low-rent, run-down one. 

  • Dwelling; abode; habitation. 

  • Any form of property that is held by one person from another, rather than being owned. 

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