def jaccard_containment(s, t):
    """
    Calculate the Jaccard Containment of two sets.

    C(S, T) = |S ^ T| / |T|

    Parameters
    ----------
    s, t : iterable

    Returns
    -------
    float
    """
    s_, t_ = set(s), set(t)
    return len(s_ & t_) / len(s_)