The Centaurs were once the most numerous of all the Fae peoples of Ashen, until the Culling of Trees after which their numbers have declined.
Centaur culture is the foundation of the religion and culture of the Thrice Skinned Nomad tribes.
Centaurs have two hearts each considered to last 300 years, which presumably puts average life expectancy at 600 years.
Centaurs travel in nations, each nation has its own calendar which dictates how often they should visit Huashik, the Tree of Life. This can range from once a decade to once every two hundred years.
When they visit Huashik they provide tithes to the Corbin Larchmeisters who protect Huashik, this tithe includes members of their nation to join the Corbin Larchmeisters and live in service of the tree.