In the next step, we will build a graph of the most frequent bigrams. To build the graph, we need to know what it means.

The graph originates from the basic mathematical graph theory, where a graph is essentially a group of objects, called nodes or vertices, where certain pairs of nodes are related to each other. Diagrammatically, a graph is represented as follows, where the dots represent a **Node** and the relationship by the lines is known as an **Edge**.

Now, coming back to Pinterest, the relationship between concepts is defined as a co-occurrence in a Pin description. It means that if data science appears together with machine ...