There are three types of national elections in Haiti which are:
Chamber of Deputies: occurs every 4 years. The first election was held in 1790 and the last one was in 2016.
Senate: occurs every 4 years. The first election was held in 1808 and the last one was in 2017.
Presidential: occurs every 4 years. The first election was held in 1950 and the last one was in 2016.