How fast does invasive ductal carcinoma develop metastasis?

Can be quick, but: Could be years or never. You do not mention: size; stage, nodes + or -, age, receptor status (er, pr, her-2-neu). Breast cancer treatment can effect chance of relapse. I find the questions about speed odd...The true answer is we do not know in an individual what will happen, and rely on group statistics to frame what we tell patients. I emphasize, that individual may not behave like a group.