Animator Bill Plympton is noted for his style of animation that uses very few inbetweens and sequences that are done on threes or on fours, holding each drawing on the screen from an eighth to a sixth of a second.[2] While Plympton uses near-constant three-frame holds, sometimes animation that simply averages eight drawings per second is also termed "on threes" and is usually done to meet budget constraints, along with other cost-cutting measures like holding the same drawing of a character for a prolonged time or panning over a still image, techniques often used in low-budget TV productions.