What is the secret to learning limit breaks?

[Crossblades]

I'm always surprised by how many people don't know this.

1-1: Each character starts with this one.
1-2: The character must have performed his 1-1 Limit Break eight times.

2-1: The character must have killed 80 enemies.
2-2: The character must have performed his 2-1 Limit Break eight times.

3-1: The character must have killed an additional 80 enemies.
3-2: The character must have performed his 3-1 Limit Break eight times.

Is that accurate or is it approximate?