"elections" - this is an outdated graphic (hasn't been updated since 2015) but scroll down to see the length of terms graph: https://projects.voanews.com/africa

"elections" - this is an outdated graphic (hasn't been updated since 2015) but scroll down to see the length of terms graph: https://projects.voanews.com/african-presidents/ https://projects.voanews.com/african-presidents/ Chad is near top of the list.