Census of population is usually conducted every 10 years. This means that every decade, the government counts the number of people living in a particular country or region. This is done to get a better understanding of the population, such as their demographics, ages, and occupations. It also helps the government to plan and allocate resources based on the needs of the population. For example, if there is a growing number of school-aged children in a particular area, the government can plan to build more schools to accommodate them. The census is important because it helps to ensure that everyone is counted and represented in the government's decisions.