Cooccurrence [...]

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Methods, devices, and computer-readable media described herein may provide a recommender system that may increase the serendipity associated with a recommendation. The recommender system omits obvious co-occurred items, rare items, and limits a number of co-occurred items associated with an item table. Local and global weighting values may be calculated to derive a co-occurrence weight. The co-occurrence weight may be compared to maximum and minimum threshold co-occurrence values to omit obvious and rare co-occurred items.