attestation vs sealing wax

attestation

noun
  • An appearance in print or otherwise recorded on a permanent medium. 

  • The process, performed by accountants or auditors, of providing independent opinion on published financial and other business information of a business, public agency, or other organization. 

  • A thing that serves to bear witness, confirm, or authenticate; validation, verification, documentation. 

  • A confirmation or authentication. 

sealing wax

noun
  • Wax formerly melted onto a letter to seal it; the picture of the sender's seal was often pressed into the wax as evidence that the letter had not been opened. 

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