'frequently-seen' originates from the combination of 'frequent' and 'see', where 'frequent' meant 'occurring often' and 'see' meant 'to perceive with the eyes'.

'frequent' changed from the Latin word 'frequentare' and 'see' from the Old English word 'seon', eventually forming the modern English term 'frequently-seen'.

Initially, 'frequent' meant 'crowded' and 'see' meant 'to look', but over time it evolved into its current meaning of 'commonly observed'.