There is too noun יוּבָל, stream (Jer 17:8) and also Jubal, a man who invented a music instrument (Gen 4:21). But clearly neither fits in our text.
We can ask here: what is the relation between ram and jubilee if any? And we find the answer in the Bible: every fiftieth year was marked by blowing of cornets, the ram horns were blown every fifty years: look for instance at Lev 25:13.
Words 101 + 102: about half jubilee, namely nearly 25 years.