(up) in the air vs deferred

(up) in the air

deferred

adj
  • Yielded to someone else's decision or judgment. 

  • Delayed; put off till later. 

  • Whose value is not realized until a future date: e.g. annuities, charges, taxes, and income, either as an asset or liability. 

noun
  • A deferred bond. 

  • Synonym of promise (“object representing delayed result”) 

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