Histogram
A histogram displays the distribution of data over a continuous interval or specific time period. The height of each bar in a histogram indicates the frequency of data points within the interval/bin.
More about: Histogram - Other tutorials: R Matplotlib
Population Pyramid
A population pyramid consists of two histograms, one for each gender (conventionally, males on the left and females on the right) where the population numbers are shown horizontally (X-axis) and the age vertically (Y-axis).
More about: Population pyramid - Other tutorials: R Matplotlib