The Nuance Difference: "毎年" vs "役に立つ"

In Japanese, both 毎年 and 役に立つ are often translated to English but have distinct usages. 毎年 (まいとし (maitoshi)) represents "every year" (Level: N5) and typically represents Indicates an action or event that occurs yearly. 「毎年」 can also be read 'mainen', but 'maitoshi' is more common in N5 level spoken Japanese.. On the other hand, 役に立つ (やくにたつ (yaku ni tatsu)) translates to "to be useful, to be helpful" (Level: N4) and is used for A set phrase meaning to be useful or helpful for someone or something. It describes the utility of an object, skill, or person. Often followed by the particle に. Mixing these up can sound unnatural to native Japanese speakers!