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Use "insaneness" in a sentence
"The style is not only amazing, but it represents the insaneness."
"Of course, this hand-wringing over not having completely caught up on life, the universe and everything, and finished my revisions, could also be the usual case of my never quite cutting myself enough slack*, since I only got home from two weeks of insaneness in Vermont last Friday and we've had something called a catastrophic ice storm this week we only lost power for one night**, thankfully--so far, anyway."
"Nataly could not utter all that her insaneness of feeling made her think with regard to Victor's daughter -- daughter also of the woman whom her hard conscience accused of inflammability."