from typing import Counter


def count_overlaps(coordinates):
    """
    Count how many coordinates are present more than 1 time.

    Args:
        coordinates (list): list of coordinates as tuples

    Returns:
        int: number of overlaps
    """
    counter = Counter(coordinates)
    overlaps = 0

    for occurence in counter.values():
        if occurence > 1:
            overlaps += 1

    return overlaps