in a snap vs shortly

in a snap

adv
  • At once, almost immediately, very quickly or suddenly. 

shortly

adv
  • In a short or brief time or manner; quickly. 

  • In few words 

  • In or after a short time; soon. 

  • In an irritable ("short") manner. 

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