I was wondering what are the procedures of radiation therapy and chemotherapy and how long does the procedure takes to clean the body from the cancer cells?

It depends: Radiation therapy (rt) is used to treat specific spots of cancer, while chemotherapy is used to treat the whole body. Rt is similar to getting an x-ray, but for 15+ minutes repeated every day, for weeks to months. Chemotherapy is an IV medicine given daily, weekly, or every few weeks, over several months. Details depend on the type of cancer being treated.