'frequently-produced' originates from the combination of 'frequent' and 'produce', where 'frequent' comes from Latin 'frequentare', meaning 'to visit often', and 'produce' comes from Latin 'producere', meaning 'to lead or bring forth'.

'frequentare' transformed into the Old French word 'frequent', and 'producere' became the Old French 'produire', eventually forming the modern English 'frequently-produced'.

Initially, 'frequent' meant 'to visit often', and 'produce' meant 'to lead forth', but over time, they evolved to mean 'occurring often' and 'to create or manufacture', respectively.