what else could you use the Volhard method in Chemistry for? like is it used in a certain context?

The Volhard method can be used for almost any ion that forms a suitable ppt with Ag ion since it is an indirect method. In practice, you add an excess of AgNO3 to form the AgX ppt, then titrate the excess Ag added with CNS^-. Br^-, I^-, Cl^-, and a host of others.