'erratically-recorded' originates from the English compounding of 'erratically' (from Latin 'erraticus,' from 'errare' meaning 'to wander') and 'recorded' (from Latin 'recordari' meaning 'to remember'), forming a hyphenated attributive adjective meaning 'recorded in an erratic way.'

'erratically-recorded' arose in modern English as a hyphenated pre-nominal modifier combining the adverb 'erratically' (+ '-ly' from 'erratic' < Latin 'erraticus') with the past participle/adjectival form 'recorded' (from Old French 'record' < Latin 'recordari').

Initially, it conveyed 'recorded in a wandering/irregular manner,' and this sense remains its primary modern usage.