attestation vs data set

attestation

noun
  • 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. 

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

data set

noun
  • A set of data to be analyzed. 

  • A file of related records on a computer-readable medium such as disk, especially one on a mainframe computer; a dataset. 

  • A modem (that connects a device such as a teletype to an ordinary telephone). 

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