come down with vs incur

come down with

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

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

incur

verb
  • to render somebody liable or subject to 

  • to bring upon oneself or expose oneself to, especially something inconvenient, harmful, or onerous; to become liable or subject to 

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