come down with vs pay up

come down with

verb
  • To lay down (money) in payment; to pay. 

  • To contract or get (an illness); to show symptoms of. 

pay up

verb
  • To pay in total a sum which is owed, especially when the sum has been owed for a period of time. 

How often have the words come down with and pay up occurred in a corpus of books? (source: Google Ngram Viewer )