先後

先后
xiānhòu
  1. early or late; first and last; priority
  2. in succession; one after another

CEDICT

Entry Composition

1 先 xiān
  1. beforehand; first; earlier
  2. at first; originally
  3. for the time being; for now
  4. (prefix) my late (in referring to deceased relatives older than oneself)
2 後 hòu
  1. back
  2. behind
  3. rear
  4. afterwards
  5. after
  6. later
  7. post-