dash off vs shorthand

dash off

verb
  • To write quickly or informally. 

  • To leave a place quickly or briefly. 

shorthand

verb
  • To write in shorthand. 

  • To use a brief or shortened way of saying or doing something. 

  • To render (spoken or written words) into shorthand. 

noun
  • A rough and rapid method of writing by substituting symbols for letters, words, etc. 

  • Any brief or shortened way of saying or doing something. 

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