Plural of aberrancy; multiple instances or examples of deviation from what is normal or expected.
From 'aberrancy' (an alternative form of 'aberrance') + '-ies' (regular English plural). Both 'aberrance' and 'aberrancy' emerged as synonymous noun forms in the 18th-19th centuries.
The fact that English has both 'aberrance' and 'aberrancy' as near-synonyms is typical of how the language tolerates variation—speakers sometimes split the difference and use both, never quite standardizing on a single form.
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