cesser vs expungement

cesser

noun
  • termination or cessation. 

  • A neglect of a tenant to perform services, or make payment, for two years. 

expungement

noun
  • The act of expunging. 

  • The process by which the record of a criminal conviction is erased, destroyed or sealed. 

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