degree of difficulty

noun

a rating which reflects the difficulty of the manoeuvre or action an athlete is attempting to perform in sports such as gymnastics and diving, and which is factored into the final score

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012