The Nuance Difference: "ゆっくり" vs "安心する"

In Japanese, both ゆっくり and 安心する are often translated to English but have distinct usages. ゆっくり (ゆっくり (yukkuri)) represents "slowly, leisurely" (Level: N5) and typically represents Adverb. Indicates an action is performed at a slow pace or in a relaxed manner. Can also be used to tell someone to take their time.. On the other hand, 安心する (あんしんする (anshin suru)) translates to "to be relieved, to feel at ease" (Level: N4) and is used for する verb. Used to express a feeling of relief or peace of mind after a period of worry or anxiety. Opposite of 心配する. Mixing these up can sound unnatural to native Japanese speakers!