daybook vs workbook

daybook

noun
  • A logbook. 

  • A daily chronicle; a diary. 

  • An accounting journal. 

workbook

noun
  • A book, used by a business, containing a record of work to be done, or work completed. 

  • A collection of spreadsheets stored in the same file. 

  • A book, used by a student, in which answers and workings may be entered besides questions and exercises. 

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