'periodically-reviewed' originates from the combination of 'periodically' and 'reviewed'. 'Periodically' comes from 'periodic', which originates from the Greek word 'periodikos', meaning 'recurring at intervals'. 'Reviewed' comes from 'review', which originates from the Latin word 'revidere', where 're-' meant 'again' and 'videre' meant 'to see'.

'Periodically' changed from the Greek word 'periodikos' to the modern English word 'periodic', and eventually became 'periodically'. 'Reviewed' evolved from the Latin 'revidere' to the Old French 'reviser', and eventually became the modern English word 'reviewed'.

Initially, 'periodically' meant 'recurring at intervals', and 'reviewed' meant 'to see again'. Over time, 'periodically-reviewed' evolved to mean 'subject to regular examination'.