longing vs wishful

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 

wishful

adj
  • Aspiring, or seeking advancement. 

  • Expressing a wish or longing for something. 

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