In January 2011, Frenkel twice set a new Israeli national indoor record, at 1.87 meters and 1.90 meters. In March, at the European Indoor Championships in Paris, she set an Israeli record of 1.94 meters in qualifying. In the final, she reached fourth place with a jump of 1.92m, another best ever achievement for an Israeli woman. In July 2011, she became Israeli national champion for the second consecutive year, with a jump of 1.89 m. In August, she had a disappointment at the World Championships in Daegu, as she jumped only 1.85m and failed to qualify. Her season best outdoors was 1.90m, set in June at Neurim.