Find the member of a set that means "count" or "frequency" or "probability" or "number of occurrences".

def find_count_label(d):
    """Find the member of a set that means "count" or "frequency" or "probability" or "number of occurrences".

    """
    for name in COUNT_NAMES:
        if name in d:
            return name
    for name in COUNT_NAMES:
        if str(name).lower() in d:
            return name