by trade

Prepositional phrase

idiomatic

(idiomatic) As a profession; professionally.

Japanese Meaning

本業として / 職業上 / 職業として

She's a carpenter by trade, but she spends her weekends painting landscapes.

彼女は職業としては大工ですが、週末は風景画を描いて過ごしています。

Sense（1）

(idiomatic) As a profession; professionally.

Although he was a gifted musician, he was a plumber by trade and never played music professionally.