urgency vs weightiness

urgency

noun
  • The quality or condition of being urgent. 

  • Insistence, pressure, urge. 

  • A sudden and compelling need to urinate that is difficult to defer, associated with conditions such as urinary tract infections and overactive bladder. 

weightiness

noun
  • The quality of being weighty. 

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