saltation vs skipping

saltation

noun
  • A leap, jump or dance. 

  • A sudden change from one generation to the next; a mutation. 

  • Any abrupt transition. 

  • Beating or palpitation. 

  • The transport of loose particles by a fluid (such as wind or flowing water). 

skipping

noun
  • The game, activity, or exercise of jump rope. 

  • The act by which something is skipped or omitted. 

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