Sturm und Drang vs convulsion

Sturm und Drang

noun
  • A proto-Romantic movement in German literature and music which occurred from the late 1760s to the early 1780s, emphasizing individual subjectivity and the free expression of emotions. 

  • Turmoil; a period of emotional intensity and anxiety. 

convulsion

noun
  • An uncontrolled fit, as of laughter; a paroxysm. 

  • An intense, paroxysmal, involuntary muscular contraction. 

  • Violent turmoil. 

How often have the words Sturm und Drang and convulsion occurred in a corpus of books? (source: Google Ngram Viewer )