'irregularly' originates from Latin, specifically the word 'irregularis,' where 'in-' meant 'not' and 'regularis' meant 'according to rule.' 'Recorded' comes from Latin 'recordari,' where 're-' meant 'again' and 'cordis' meant 'heart or mind.'

'irregularis' transformed into the Old French word 'irregulier,' and eventually became the modern English word 'irregular.' 'Recordari' transformed into the Old French word 'recorder,' and eventually became the modern English word 'record.'

Initially, 'irregular' meant 'not according to rule,' and 'record' meant 'to recall to mind.' Over time, 'irregularly-recorded' evolved to mean 'recorded in a manner that is not consistent or regular.'