from collections import Counter
subsets = [set(['Breakfast & Brunch', 'Restaurants']), set([
    'American (Traditional)', 'Breakfast & Brunch']), set([
    'American (Traditional)', 'Restaurants']), set([
    'American (Traditional)', 'Breakfast & Brunch']), set([
    'Breakfast & Brunch', 'Restaurants']), set(['American (Traditional)',
    'Restaurants'])]
How to count the occurrences of sets which are part of a list in Python?