Is it poor at maths or poor in maths?

I'm curious, which of these expressions is more appropriate when discussing someone's lack of proficiency in mathematics: "Is it poor at maths?" or "Is it poor in maths?" As a language enthusiast and a professional in the field of cryptocurrency and finance, where mathematical skills are often crucial, I'm interested in understanding the nuances of these phrases. I've noticed that language can be subtle, and the choice of prepositions can significantly impact the meaning of a sentence. So, I'm wondering if one of these expressions is more commonly used, or if there's a specific reason to prefer one over the other when referring to someone's deficiency in mathematical ability. Could you help me clarify this point, and perhaps provide some insight into the etymology or usage of these phrases?