LucidChart offers access to a number of diagrams that can be manipulated to illustrate ideas.
To add the Google Addon to your Google account, in a Google Doc, click on Addon>LucidChart>Insert Diagram. The first time you do this, you will be asked to allow LucidChart access to the documents you make using the Add-On.
Clicking on the Venn Diagram will take you to the program where text/data can be inserted. The completed diagram will be stored in your LucidChart account and available to insert in any other Google Doc.