I'm not exactly sure what you're asking, but I'll define the word "combo" for you, and hopefully that will clear it up.
The word "combo" is a casual abbreviation of the word "combination", which a joining together of two or more steps or step patterns. Sometimes we also use the word "amalgamation" or "grouping". A combo can be short, such as a Whisk & Chasse, or it can be long, such as some of our extended variations which encompass an entire short side.
Technically, a combo could be even longer than that... there's no actual limit on the length in the definition of the word. However, when a combo is really long, we might be more inclined to refer to it as a "routine".
Sincerely,
Jonathan Atkinson