Conversation so far:
What did Billie Jean King do during these prime competitive years from 1966 to 1975?
Six of King's Grand Slam singles titles were at Wimbledon, four were at the U.S. Championships/Open, one was at the French Open, and one was at the Australian Championships.

Question: did she win any?
Self-contained rewrite: Did Billie Jean King win any tournaments during these prime competitive years from 1966 to 1975?