Use Histogram to examine the shape and spread of your data. A histogram divides sample values into many intervals and represents the frequency of data values in each interval with a bar. A histogram works best when the sample size is at least 20. However, a sample size that is considerably greater than 20 may better represent the distribution. Source: Minitab Help | Prof. Marcelo Machado Fernandes

How to Create a histogram using data analysis in Excel