[SyntaxQ]

pawn Код:

if(GetPVarInt(i, "TotalFreqientie")) == GetPVarInt(playerid, "TotalFreqientie"))
{
     SendClientMessage(i,COLOR_YELLOW,string);
}

Player radio frequency should be equal to the frequency of 'i' to chat? Do you want it like this?

Also, you don't set any value to the variable?

pawn Код:

stock GetPlayerFrequentie(playerid)
{
    new frq[20];
    format(frq, sizeof(frq), "%d.%d", FreqCount1[playerid],FreqCount2[playerid]);
    printf(frq);
    SetPVarInt(playerid, "TotalFrequientie", frq);
    return 1;
}

EDIT: I think, you can simply do return frq; without setting any variable in the stock and use it.
EDIT2: And you don't need to use the [playerid] tags with the variable when you are using PVars because they are already player variables.