blotter vs workbook

blotter

noun
  • A piece of blotting paper in a pad as a piece of desk furniture. 

  • A register of the related events made in the form of the list of times and brief descriptions. 

  • A daily register of arrests and other events in a police station. 

  • A portion of blotter acid. 

workbook

noun
  • A collection of spreadsheets stored in the same file. 

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

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

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