日久岁深

日久歲深
rìjiǔsuìshēn
(idiom) for a long period of time; for a number of years

CEDICT

形容时间长久。《五灯会元．卷一五．云门文偃禅师》：「翻覆思量，看日久岁深自然有个入路。」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 岁 suì
  1. variant of 岁 suì, year
  2. years old
=2 岁 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.)