incredibly vs ultra

incredibly

adv
  • In an incredible manner; not to be believed. 

  • To a great extent; extremely. 

  • Used to note the surprising or hard-to-believe nature of what is being said and suggest that it is nevertheless true. 

ultra

noun
  • An especially devoted football fan, typically associated with the intimidating use of extremist slogans, pyrotechnics and sometimes hooligan violence. 

  • An ultra-prominent peak. 

  • Code name used by British codebreakers during World War 2 for decrypted information gained from the enemy. 

  • An extremist, especially an ultranationalist. 

  • An ultraroyalist in France. 

  • An ultramarathon. 

adj
  • Extreme; far beyond the norm; fanatical; uncompromising. 

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