CLL is subset for 2x2 which lets you orient and permute the last layer corners simultaneously and the speed is worth the practice. It's like getting a PLL skip every solve and is sort of like ZBLL for 2x2. The alg count can be considered high - equal to about 2/3 of the 57 3x3 OLL's, but is nowhere near the 472 3x3 ZBLL's. Given that there aren't any edges to worry about on a 2x2, the algs for CLLs can be shorter and way less abundant(~1/12 of ZBLL) than whatever ZBLL you might use for the case.
Here's a link to Chris Olson's website https://cyotheking.squarespace.com/
Alg Count - 40
(42 with the 2 PLL cases)
Here's a link to Chris Olson's website https://cyotheking.squarespace.com/
Alg Count - 40
(42 with the 2 PLL cases)