FreqCache: Accelerating Embodied VLN Models with Adaptive Frequency-Guided Token Caching. - Zihao Zheng; Xingyue Zhou; Zhihao Mao; Songyu Sun; Lingyue Zhang; Yulong Ao; Yupu Feng; Qiongqiong Zhang; Yonghua Lin; Xiang Chen (CoRR, 2026)