camposanto vs necropolis

camposanto

noun
  • A burial place or cemetery, in Italian- or Spanish-speaking regions. 

necropolis

noun
  • An ancient site used for burying the dead, particularly if consisting of elaborate grave monuments. 

  • A cemetery; especially a large one in or near a city. 

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