日久歲深

日久岁深
rìjiǔsuìshēn
(idiom) for a long period of time; for a number of years

CEDICT

形容時間長久。《五燈會元．卷一五．雲門文偃禪師》：「翻覆思量，看日久歲深自然有個入路。」也作「年深日久」。

重編國語辭典

Entry Composition

1 日久 rìjiǔ with the passage of time; over time
2 歲 suì
  1. classifier for years (of age)
  2. year
  3. year (of crop harvests)
=3 深 shēn old variant of 深 shēn
=3 深 shēn deep (lit. and fig.)