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Keharwa is an 8-beat pattern used in ragas. It has eight beats in two equal divisions (vibhag). The period between every two beats is equal. The first beat out of 8 beats is called "sam" and the fifth beat out of 8 beats is called "khali". Sam is the first Division. Khali is the second Division. To exhibit the Keherwa, the audience claps on the first beat and then shows that fifth beat is waived (not clapped).
It has a characteristic pattern of bols (theka).