Looking on the internet deeply has found these results:

sorry, for late responding is the most popular phrase on the web.

sorry fo late replying 12 results on the web	sorry, for late responding 13,130 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
To that effect, replying late and avoiding not legislative but moral obligations are signs of a censurable attitude. Fo means... 'the late', Cimin is his surname, see? Sorry to phone you so late... It is substantially late in replying to the Ombudsman in the majority of access to documents cases and, in some cases, the delays are very lengthy. I just want to say I'm sorry for letting Kidd Fo Fo talk to you the way he did. Sorry. Too late for your eyesight. It did not reply within the time period laid down and is replying now, orally, two months late.	I'm sorry, too, for everything. I'm real sorry, Leo, for all the mess. I'm truly sorry, judge Callaghan, for everything. Guys, sorry, for a moment of attention. I'm sorry, for losing my temper. I am sorry, taylor, for all of it. Sorry, Mike, for a minute there...

sorry fo late replying

12 results on the web

sorry, for late responding

13,130 results on the web

More popular!

To that effect, replying late and avoiding not legislative but moral obligations are signs of a censurable attitude.
Fo means... 'the late', Cimin is his surname, see?
Sorry to phone you so late...
It is substantially late in replying to the Ombudsman in the majority of access to documents cases and, in some cases, the delays are very lengthy.
I just want to say I'm sorry for letting Kidd Fo
Fo talk to you the way he did.
Sorry. Too late for your eyesight.
It did not reply within the time period laid down and is replying now, orally, two months late.