That would be ticks.
Here's a line example of code from an animation:
6,0,0,0,8
Let's break it down:
6,0: Sprite group, sprite number.
0,0: X and Y axis.
8: time.
If you want the animation slower you want to increase the amount of ticks it takes to complete that part of the animation. so in this case, it'd mean to increase the number "8"
keep in mind this is just the line of a simple animation, there's many other parameters.
