shortness of breath vs sniffle

shortness of breath

noun
  • difficulty in breathing; dyspnea 

sniffle

noun
  • The act, or the sound of sniffling; the condition of having a runny or wet nose, as from a cold or allergies. 

verb
  • To utter with a whimpering or sniffing sound. 

  • To make a whimpering or sniffing sound when breathing, because of a runny nose. 

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