The quality or condition of being fortuitous.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "fortuity" in a sentence
"Locals may recall his collaboration with composer John Adams for the San Francisco Opera production of Doctor Atomic (which, in an instance of festival fortuity, is documented in Jon Else's Wonders Are Many)."
"Dam you both seem to have some intestinal fortuity to maybe stand up and get the help needed to be able to deal in the real world."
"If, according to some, Friday the 13th is an unlucky day, then shouldn't Friday the 7th (because 7 has been identified by many as a lucky number) be full of fortuity and good things?"