What example would you give an Ostrinato?

An ostrinato is a musical term that refers to a repeated pattern or phrase, typically in the bass or a rhythmic motif. A classic example of an ostinato is the ground bass in Pachelbel's "Canon in D," where the bass line is repeated throughout the piece while the upper voices vary. Another example is the "Boléro" by Maurice Ravel, which features a persistent rhythmic pattern that builds in intensity over time.