What is the translation of "Vateishvu be'Kadesh"?
Rashi (in Iyov, 22:8): Either 'You stayed back' (delayed) or 'You spent a long time'.
What is the meaning of "ka'Yamim asher Yeshavtem"?
Rashi (citing Seider Olam): It means that they remained in Kadesh as long as all their other travels put together. After the Meraglim, they spent thirty-eight years in the Midbar, 1 nineteen years in Kadesh and nineteen years traveling, at which point they returned to Kadesh.
See Sifsei Chachamim.