trouble (I have put you through); (your) hard work
thank you (for your hard work); I appreciate your efforts
ご苦労をおかけしました。
I'm sorry for the trouble.
長年のご苦労が実を結んだ。
Years of hard work bore fruit.
ご苦労の末に完成した作品は高い評価を得た。
The work completed after great effort received high praise.