There are three types of national elections in Nigeria which are:
Presidential: occurs every 4 years. The first election was held in 1979 and the last one was in 2023.
Parliamentary (House): occurs every 4 years. The first election was held in 1923 and the last one was in 2023.
Parliamentary (Senate): occurs every 4 years. The first election was held in 1979 and the last one was in 2023.