Conversation so far:
when did the queen become queen of england
Queen Elizabeth II became queen on February 6, 1952, and was crowned on June 2, 1953.
who is the longest reigning british monarch
Queen Elizabeth II became the longest-reigning British monarch on 9 September 2015 when she surpassed the reign of her great-great-grandmother Victoria.

Question: how many years
Self-contained rewrite: how many years did queen victoria reign