difficulty vs hiccup

difficulty

noun
  • An awkward situation or quarrel. 

  • Physical danger from the environment, especially with risk of drowning 

  • An obstacle that hinders achievement of a goal. 

  • The state of being difficult, or hard to do. 

  • An objection. 

  • That which cannot be easily understood or believed. 

hiccup

noun
  • A minor setback. 

  • Any spasm or sudden change. 

  • A spasm of the diaphragm, or the resulting sound. 

verb
  • To produce an abortive sound like a hiccup. 

  • To produce a hiccup; have the hiccups. 

  • To say with a hiccup. 

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