(up) in the air vs outstanding

(up) in the air

outstanding

adj
  • Exceptionally good; distinguished from others by its superiority. 

  • Projecting outwards. 

  • Prominent or noticeable; standing out from others. 

  • Unresolved; not settled or finished. 

  • Owed as a debt. 

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