'frequently' originates from Latin, specifically the word 'frequentia,' where 'frequent-' meant 'crowded or repeated.' 'Collected' originates from Latin, specifically the word 'collectus,' where 'col-' meant 'together' and 'legere' meant 'to gather.'

'frequentia' transformed into the Old French word 'frequent,' and eventually became the modern English word 'frequent.' 'Collectus' transformed into the Old French word 'collecter,' and eventually became the modern English word 'collect.'

Initially, 'frequent' meant 'crowded or repeated,' and 'collect' meant 'to gather together.' Over time, 'frequently-collected' evolved to mean 'gathered often or regularly.'