impulse vs longing

impulse

noun
  • A wish or urge, particularly a sudden one prompting action. 

  • A thrust; a push; a sudden force that impels. 

  • The integral of force over time. 

verb
  • To impel; to incite. 

longing

noun
  • An earnest and deep, not greatly passionate, but rather melancholic desire. 

  • The buying of a financial instrument with the expectation that its value will rise 

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