Crevice
Gap, Space, Chance, Fault, Room
noun
すき
隙 （すき） Crevice, Gap, Space, Chance, Fault, Room
隙間 （すきま） Crevice, Crack, Gap, Opening
間隔 （かんかく） Space, Interval, Gap
Yuri says 隙 is for a non-physical time Gap or Chance.