def hertz_4_humans(count: int) -> str:
    """Returns a human friendly interpretation of hertz."""

    # Hertz
    if 1000 > count >= 1:
        return f"{round(count, 2)} Hz"

    # Kilohertz
    if 1000 > count / 1000 >= 1:
        return f"{round(count / 1000, 2)} KHz"

    # Megahertz
    if 1000 > count / 1000 ** 2 >= 1:
        return f"{round(count / 1000 ** 2, 2)} MHz"

    # Gigahertz
    if 1000 > count / 1000 ** 3 >= 1:
        return f"{round(count / 1000 ** 3, 2)} GHz"

    # Return in Teraahertz if all else fails
    return f"{round(count / 1000 ** 4, 2)} THz"