downhill vs dropping

downhill

noun
  • A rapid descent of a hill in related sports, especially in alpine skiing. 

  • The fastest of the disciplines of alpine skiing. 

adv
  • Deteriorating, getting worse. 

  • Down a slope. 

verb
  • To take part in downhill skiing. 

adj
  • Easy. 

  • Located down a slope or hill. 

  • Going down a slope or a hill. 

dropping

noun
  • The act of something that drops or falls. 

  • Something dropped; a droplet. 

  • A piece of animal excrement; dung. 

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