looks like a machine learning algorithm so we process a bunch of texts on the internet let's say and we're going to build this matrix called the word word co-occurrence matrix and so what we can kind of think of is it's a square matrix where the ith entry corresponds to for a given word like water the count of another word and whether they co-occur with each other so it might be you have to define when a co-occurrence is so that just means that the two happened to be present together and you might define a window of this for instance they both