book of original entry vs daybook

book of original entry

noun
  • A record book in which all transactions (or all of a certain class) of a business are recorded and from entries are made in accounting records such as the general ledger or subsidiary ledgers. 

daybook

noun
  • An accounting journal. 

  • A daily chronicle; a diary. 

  • A logbook. 

How often have the words book of original entry and daybook occurred in a corpus of books? (source: Google Ngram Viewer )