Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 23; Flight Crew Total 14655; Flight Crew Type 2489
Situational Awareness
Deviation / Discrepancy - Procedural Clearance; Ground Incursion Taxiway
Air Traffic Control Issued New Clearance; Air Traffic Control Provided Assistance
Environment - Non Weather Related; Human Factors
First flight in over 6 weeks only second time in ZZZ in over 5 years. Have flown only 3 other legs since CQMV in March and those were in May. Missed the turn to [Taxiway] R from [Taxiway] B had to turn around and use new taxi route to get to runway.  I was under the impression R was further down B. We also had a runway change from plan. I may have still had that route in mind when I missed the turn.
On taxi out we received [an] unexpected runway for departure. Taxi instructions were A; AX; B; R ; [Runway] XR. The FMC was reprogrammed accordingly and we got our new takeoff data. As we were on B I asked the Captain if I could begin the before takeoff checklist. As I was doing the checklist we passed the right turn to R. Ground advised us of the error and gave us new taxi instructions. No other problems were noted and taxied out the rest of the way to XR.
Air carrier flight crew reported a taxiway incursion.  Captain cited lack of recent flying.