crypt vs mausoleum

crypt

noun
  • An underground vault, especially one beneath a church that is used as a burial place. 

  • Any of the genus Cryptopus of orchids of Madagascar and Mauritius. 

  • A small pit or cavity in the surface of an organ or other structure. 

  • Any of the genus Cryptocoryne of aquatic plants of southern and southeastern Asia. 

mausoleum

noun
  • A large stately tomb or a building housing such a tomb or several tombs. 

  • A gloomy, usually large room or building. 

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