Methodical

google

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late 16th century: via late Latin from Greek methodikos (from methodos : see method) + -al.

wiktionary

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From Ancient Greek μεθοδικός(methodikós, “going to work by rule, systematic, crafty”), +‎ -al.

etymonline

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methodical (adj.)

1560s, "pertaining to or characterized by method," from French methodique and directly from Late Latin methodicus, from Greek methodikos, from methodos (see method). Meaning "systematic, orderly" is by 1660s. Related: Methodically.