There is no right frequency. It is something you have to figure out after a while. You can use SMM in digital marketing tools to help understand which combination has given best results to decide. Content marketing in social media is very important and a fine balance between not posting at all and over posting has to be maintained. The practices depend on the kind of reach and target you are aiming at. Digital marketing for politicians is very different from what a social media marketing agency for small business can offer because though the audience might be the same the channel is contrasted.