Looking on the internet deeply has found these results:

sorry for the delay in my answer is the most popular phrase on the web.

sorry for the delay of my answer 110,100 results on the web	sorry for the delay in my answer 123,300 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Sorry for the delay, folks. Sorry for the delay, I had an unexpected. Sorry for the delay, your honor. Mr. Singer, I'm sorry for the delay. Sorry for the delay, Tommy. Good morning to everybody, sorry for the delay. Ms. Sutton, sorry for the delay. Sorry for the delay, the speech Ministerial never ended.	Nothing came as an explanation for the delay in the consultation process. Please accept my apology for the delay in your release. Nothing came as an explanation for the delay in the consultation process. Everyone bears part of the responsibility for the delays in using up the funds. I urge the Commission to provide a solid explanation for the delays in implementing the Lisbon Strategy. Sorry for the delay in getting back to you. Sorry for the delay in answering, but l've been out of town for a week. There is no justification for the delays in drafting a directive on this matter.

sorry for the delay of my answer

110,100 results on the web

sorry for the delay in my answer

123,300 results on the web

More popular!

Nothing came as an explanation for the delay in the consultation process.
Please accept my apology for the delay in your release.
Nothing came as an explanation for the delay in the consultation process.
Everyone bears part of the responsibility for the delays in using up the funds.
I urge the Commission to provide a solid explanation for the delays in implementing the Lisbon Strategy.
Sorry for the delay in getting back to you.
Sorry for the delay in answering, but l've been out of town for a week.
There is no justification for the delays in drafting a directive on this matter.