memorandum vs scribbling

memorandum

noun
  • A short note serving as a reminder. 

  • A brief diplomatic communication. 

  • A written business communication. 

  • A page in an annual publication honoring the memory of a person who died during the past year. 

scribbling

noun
  • That which has been scribbled, written in a scrawled or careless hand. 

  • The carding of wool or cotton. 

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