This table is adapted from White, From Jesus to Christianity. Note that the matching of Paul's travels in the Acts and the travels in his Epistles is done for the reader's convenience and is not approved of by all scholars.
There is debate over whether Paul's visit in Galatians 2 refers to the visit for famine relief (Acts 11:30, 12:25) or the Jerusalem Council (Acts 15). If it refers to the former, then this was the trip made "after an interval of fourteen years" (Gal. 2:1).
↑Paul does not exactly say that this was his second visit. In Galatians, he lists three important meetings with Peter, and this was the second on his list. The third meeting took place in Antioch. He does not explicitly claim that he did not visit Jerusalem in between this and his first visit.
↑Note that Paul only writes that he is on his way to Jerusalem, or just planning the visit. There might or might not have been additional visits before or after this visit, if he ever got to Jerusalem.