'systematically-checked' originates from the combination of 'systematic' and 'check', where 'systematic' comes from the Greek word 'systēmatikos', meaning 'pertaining to a system', and 'check' from the Old French 'eschequier', meaning 'to inspect'.

'systematically-checked' evolved from the phrase 'systematic check', which was used in technical and scientific contexts to denote a thorough examination.

Initially, it meant 'to inspect in a systematic manner', but over time it evolved into its current meaning of 'thoroughly examined or verified in a methodical and organized manner'.