This script creates a CSV file which consists of the total number of messages you have for every Facebook conversation, everyday, over time. From here, a bar chart race can be created to visualize your conversations. For more information, see the guide at https://towardsdatascience.com/step-by-step-tutorial-create-a-bar-chart-race-animation-da7d5fcd7079. Flourish is a program which can create bar chart races, given a CSV file.
To use this script, you must first download your messenger information from Facebook. This script does not make any network calls.