I think 5-10 days is probably a reasonable expectation for the time being.
The chaos file has a stat called 'checks and counters' which shows how often pokemon A is played with pokemon B which should help you see this.Out of curiosity, would there be a way to see how much less usage pokemon A would have with pokemon B? For example, in high-ladder AG, Tapu Lele sees increased usage with pokemon such as Deoxys-A. However, it isn't used as much with extremespeed users such as mega rayquaza or arceus, because those pokemon are significantly worse without their priority moves.
according to that website maractus only has 1 counter in OUThe chaos file has a stat called 'checks and counters' which shows how often pokemon A is played with pokemon B which should help you see this.
For example, here you can see that tapu lele's most common teammate is deoxys-attack by far.
However if what you're looking for is seeing how much extreme speed usage on a mega rayquaza drops when paired with tapu lele, I don't think there's a way you can see it from the published data.
omgaccording to that website maractus only has 1 counter in OU
it's Heatran. by the way what he meant by that is that the site is very innacurate.