All 3 Uses

advocate
in
The Count of Monte Cristo
(Edited)

The only difference consists in the opposite character of the equality advocated by these two men; one is the equality that elevates, the other is the equality that degrades; one brings a king within reach of the guillotine, the other elevates the people to a level with the throne.
Chpt 5-6 *

advocated = recommended
Still, marquise, it has been so with other usurpers—Cromwell, for instance, who was not half so bad as Napoleon, had his partisans and advocates.
Chpt 5-6 *

advocates = public supporters
"Monsieur," returned the inspector, "providence has changed this gigantic plan you advocate so warmly."
Chpt 13-14

advocate = support

Definitions:

(1) (advocate as in: to advocate)
to recommend or publicly support (someone or something)
(2) (advocate as in: an advocate supporting)
a person who publicly supports and works to advance a cause

or more rarely:

someone acting in the role of a defense lawyer in England's past and in some jurisdictions today
(3) (advocate as in: an advocate in court)
a lawyer or officer of the court in some jurisdictions in Europe, colonial America, and the military
(4) (devil's advocate as in: I'll play the devil's advocate)
a person who takes an unpopular position to encourage debate or test ideas
(5) (meaning too rare to warrant focus)