I think this isn't the first time I've seen people claim that some kink is becoming so common that it makes up x% of all works.
If you filter by tags, you can look at how many pages there are to estimate how many works have a given kink. And if you also sort by date, you can go to page n to see over what length of time a certain amount of works with a certain kink have been updated/created as compared to with the same amount of works with another kink.
If you filter by tags, you can look at how many pages there are to estimate how many works have a given kink. And if you also sort by date, you can go to page n to see over what length of time a certain amount of works with a certain kink have been updated/created as compared to with the same amount of works with another kink.