'regularly-done' originates from the combination of 'regularly' and 'done', where 'regularly' means 'at regular intervals' and 'done' means 'completed'.

'Regularly' comes from the Latin word 'regularis', and 'done' is the past participle of 'do', from Old English 'don'.

Initially, 'regularly' meant 'according to rule', and 'done' meant 'completed'. Together, they convey the idea of something completed consistently.