We collect data about challenges by coaches, and the success of these challenges ever since the website's inception.
However, on this page we show a more advanced metric - how often are these challenges, and not only them, but various
video reviews, adjudicated, in favor or against the teams or coaches. We use both the data from the play-by-play files
as well as the Situation Room blog. The data is available from season 2015 on. The data is available
as an aggregate of a span. Currently we don't differentiate between regular season and playoffs.