The Collaborative International Dictionary of English v.0.48:
frailty \frail"ty\ (fr[=a]l"t[y^]), n.; pl. frailties
(fr[=a]l"t[i^]z). [OE. frelete, freilte, OF. frailet['e], fr.
L. fragilitas. See Frail, a., and cf. Fragility.]
1. The condition or quality of being frail, physically,
mentally, or morally; frailness; infirmity; weakness of
resolution; liableness to be deceived or seduced.
God knows our frailty, [and] pities our weakness.
2. A fault proceeding from weakness; foible; sin of
Syn: Frailness; fragility; imperfection; failing.