What term describes a rhythmic pulse shift from a division of 2 to a division of 3?

The term that describes a rhythmic pulse shift from a division of 2 to a division of 3 is known as "hemiola." Hemiola occurs in music when two beats in a measure are felt as three beats or when three beats are felt as two, creating an interesting interplay of rhythms. This shift allows for a dynamic and contrasting rhythmic texture, often used to enhance musical phrases and sections. It is particularly common in genres such as Baroque music and can create a feeling of tension and release within the overall rhythm. Understanding this concept is crucial for recognizing rhythmic complexities in various musical pieces.