idiom > over a long period of time
Contents
Years which
  Explanation: See "Deep-year-old in a long time."
  Source: "Two carved Pai An Jing Qi" Juanjiu know that the garden gate years which, not very hard in prison, a group of people has long been kicked outside the door. "
  Examples: Zhang Qi breath eat two or three bowls of hot wine, with their feet to the door Yi Deng, it was the night of the opening and closing latch, ~, slippery abnormal emotional kick, then jumped out. ★ Qing Chu who was "Orientation of" Twelfth Back
nián shēn yuè jiǔ
  Refers to the passage of time
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No. 3
  This is already deeply entrenched in the matter of the
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No. 4
  Said, "Nianshenrijiu", "long years in deep", "long months in deep"
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No. 5
  Well-years. Means a long time.
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English Expression
  1. n.:  over a long period of time,  with the passage of time