pyxis vs treasury

pyxis

noun
  • The box in which ashes are stored for Ash Wednesday 

  • A nautical compass 

  • A capsule in which the lid separates from the top of the fruit to release the seeds; a pyxidium 

  • A small box 

  • acetabulum 

treasury

noun
  • A place where treasure is stored safely. 

  • A place where state or royal money and valuables are stored. 

  • A collection of artistic or literary works. 

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