What do you call this?

[yutyu]

I went through the tutorial again to understand the term for each of the part of the game
Chapter - This is the obvious since it is stated clearly.
Area - The subsection under chapter; example: "Chapter 1 has 6 areas"
Stage - The subsection of Area; example: "You have earned the bonus card for this stage!"
Spins - Each spin of the wheel.
Countdown(CD) - Number of spins left before this action take place.

but there is one thing that is not mentioned in the tutorial.

What do you call this? a Wave? Phase? Round? Turn?

It seems that there are a lot of terms floating around for this.
Different player seems to use different term.
Just wondering, is there a standard term for this?

[Bigbadjohn]

I usually use phase......P1,P2 etc...

[Nakazawa]

I use wave

[Durst]

Thank Zeus for you, you wonderful man/woman. I needed this so badly.

[Midas]

I also use "wave" for this numbers. For me it's from Tower Defense games, where enemies come in waves.

[HernHunter]

+1 for "wave"