blotter vs rap sheet

blotter

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

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

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

  • A portion of blotter acid. 

rap sheet

noun
  • A printed police record of an individual's citations, arrests, convictions, and incarcerations, usually in a single jurisdiction. 

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