I was the security guard for Jerry Springer. I invite you to watch my show just once so that you can understand how I run things before blindly labeling me as "a tool".
None of my guests are fake. I guess you don't care about the libel charges you can get for damaging a person's character or...
OK, so you know k (the spring constant) and you know m (the mass of the spring).
frequency = \frac{1}{2 \pi} \sqrt{k/m}
Place your values into the equation and solve. Assume as if it is one system, as you have done before. This SHOULD work.