Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ăberrātĭo, ōnis, f. [aberro, II. B.], a relief from something, a diversion; perh. only in Cicero (and in him only in two passages): a dolore, Att. 12, 38, 3 (cf. ib. § 1: non equidem levor, sed tamen aberro): a molestiis, id. Fam. 15, 18, 1.