apartment complex vs tenement

apartment complex

noun
  • a set of buildings containing many apartments and ancillary functions 

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 apartment complex and tenement occurred in a corpus of books? (source: Google Ngram Viewer )