'frequently' originates from Latin, specifically the word 'frequentia,' where 'frequent-' meant 'crowded or repeated.' 'Monitor' originates from Latin, specifically the word 'monere,' where 'mon-' meant 'to warn or advise.'

'frequentia' transformed into the Old French word 'frequent,' and eventually became the modern English word 'frequent.' 'Monere' transformed into the Latin word 'monitor,' and eventually became the modern English word 'monitor.'

Initially, 'frequent' meant 'crowded or repeated,' and 'monitor' meant 'to warn or advise.' Over time, 'frequently-monitored' evolved to mean 'regularly observed or checked.'