I count three reverts: 1 2 3.  Note, from WP:3RR: "3RR is a bright line where action now becomes almost certain. It is not an 'entitlement' to revert a page a specific number of times. Administrators can and will still take action on disruptive editors for edit warring that have not violated 3RR."  Note also that 3RR applies to a single page, not necessarily a single issue on that page.  Reversions about different issues all count together.  In case you were getting the idea, repeatedly reverting once 24 hours are up is not something that is historically well tolerated either.