'frequently' originates from Latin, specifically the word 'frequentia,' where 'frequent-' meant 'crowded or repeated.' 'Executed' originates from Latin, specifically the word 'executus,' where 'ex-' meant 'out' and 'sequi' meant 'follow.'

'frequentia' transformed into the Old French word 'frequent,' and eventually became the modern English word 'frequent.' 'Executus' transformed into the Old French word 'executer,' and eventually became the modern English word 'execute.'

Initially, 'frequent' meant 'crowded or repeated,' and 'execute' meant 'to follow out,' but over time they evolved into their current meanings of 'often' and 'to carry out or perform.'