ledger vs record book

ledger

noun
  • A book for keeping notes; a record book, a register. 

  • A large, flat stone, especially one laid over a tomb. 

  • A distributed ledger, a public financial transaction database, typically using a blockchain. 

  • A board attached to a wall to provide support for attaching other structural elements (such as deck joists or roof rafters) to a building. 

  • A book or other scheme for keeping accounting records. 

  • A collection of accounting entries consisting of credits and debits. 

verb
  • To use (a certain type of bait) in bottom fishing. 

  • To engage in bottom fishing. 

  • To record (something) in, or as if in, a ledger. 

record book

noun
  • a book in which a record is kept of events, perhaps similar to a logbook. 

  • a book which lists achievements which break records, the most famous being "Guinness World Records", formerly known as "Guinness Book of Records". 

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