Check if pandas series is in another series, and keep the count of occurrence

Question

  profile_id
0   5ef5dfdb2ab4cf551d8bcfd4
1   5ef5ea68df376c7656e0c1ec
2   5ef5f5b7df376c7656e0c1f1
3   5ef6156f2ab4cf551d8bcfde
4   5ef5fe652ab4cf551d8bcfdb
... ...