count to ten
To take a moment to calm down, especially when angry, before doing anything rash or hasty. Used as an imperative, it can but doesn't necessarily mean to literally count to the number ten. I know your boss said some unfair things about you, but just go count to ten so you don't end up saying something that gets you fired.
count to ten
Calm down, get hold of oneself. For example, Before you tell him what you think of him, count to ten. Often used as an imperative, this phrase in effect means that if one takes the time to count from one to ten one can regain one's composure.
count to ten
count to ten under your breath in order to prevent yourself from reacting angrily to something.