'methodically-collected' originates from the combination of 'methodically' and 'collected'. 'Methodically' comes from the Greek word 'methodikos', meaning 'systematic', and 'collected' is derived from the Latin word 'collectus', meaning 'gathered'.

'methodically' evolved from the Greek 'methodikos' through Latin 'methodicus', and 'collected' from Latin 'collectus' through Old French 'collecter', eventually forming the modern English term 'methodically-collected'.

Initially, 'methodically' meant 'systematic', and 'collected' meant 'gathered'. The combined term retains these meanings, emphasizing systematic gathering.