Frequent Itemsets and Association rules Association Rules Scale of the problem WalMart sells 100,000 items and can store billions of baskets The Web has billions of words and many billions of pages. 11Frequent Itemsets and Association Rules 11 Scale of the Problem ▪ WalMart sells 100,000 items and can store billions of baskets. ▪ The Web has billions of words and many billions of pages. Association Rules