I want to know the answer to the following question:
In what century was it believed that the UK used the word varsity to refer to a university?
All the background I'm provided with is that "Colloquially, the term university may be used to describe a phase in one's life: "When I was at university..." (in the United States and Ireland, college is often used instead: "When I was in college...").". Is that enough to answer the question?