def most_frequent_char(text: str) -> str:
    caracteres = {}

    for letra in text:
        if letra in caracteres:
            caracteres[letra] += 1
        else:
            caracteres[letra] = 1

    maxcaracter = ""
    maxcantidad = 0

    for letra in caracteres:
        if caracteres[letra] > maxcantidad:
            maxcantidad = caracteres[letra]
            maxcaracter = letra

    return maxcaracter