Noun
incredulosity (uncountable)
- (nonstandard) incredulity, incredulousness
1997 July 22, Vijay Kumar, “RJGK's SECOND anniversary !!”, in rec.music.indian.misc:Ah, evidently this Sherlock "Homles" is another one of your buddies. Shahenshah-e-jasoosee, eh? The faint incredulosity of his voice it has not been my good fortune to hear.
2005, Dennis Chamberland, chapter 36, in Mars Wars: Abyss of Elysium, Quantum Editions, →ISBN, page 317:"A British Agent?[sic]" Peter asked with all incredulosity, laughing aloud. "Why would Lipton assign a British …" “Because he knew you were infiltrated with RSE Agents – at least one and perhaps two."
2015 November, Ľuba Pavelová, Petra Mišáková, “Strategies of Social Work in Families with an Addicted Member”, in Proceedings of the 4th Biannual CER Comparative European Research Conference, London: Sciemcee Publishing, →ISBN, page 179:The partner´s feelings sway from joy because of their partner´s sobriety through doubt whether they´ll make it to outright incredulosity.