經年累月

for years / over the years

surname Nian

year / CL:個|个[ge4]

grain / harvest (old) / variant of 年[nian2]

moon / month / monthly / CL:個|个[ge4],輪|轮[lun2]

to accumulate / to involve or implicate (Taiwan pr. [lei4]) / continuous / repeated

tired / weary / to strain / to wear out / to work hard

surname Lei

rope / to bind together / to twist around

surname Jing

classics / sacred book / scripture / to pass through / to undergo / to bear / to endure / warp (textile) / longitude / menstruation / channel (TCM) / abbr. for economics 經濟|经济[jing1 ji4]

for years / year after year