Looking on the internet deeply has found these results:

i failed to ask is the most popular phrase on the web.

i forgot to ask 1466,000 results on the web	i failed to ask 11,800,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I forgot to ask if you needed anything from the outside. Listen, I forgot to ask. I'm looking after Chris's dog while he's away. I forgot to ask your surname. Sir, you know Jules and I are engaged, but I forgot to ask you May I have your daughter's hand? I forgot to ask them, sorry. There something I forgot to ask you. I forgot to ask your name.	I've been beating myself up that students were abused and I failed to see it, I failed to help them. If you have to ask, I failed. I failed to resolve the situation. I failed to mention that you qualify for our platinum card. Why ask a failed romance to come and watch your successful one? However, Greg not only failed to ask permission, he flaunted his violation on Twitter. I failed to predict your descent into addiction. I failed to take into account the cerebral immune response.

i forgot to ask

1466,000 results on the web

i failed to ask

11,800,000 results on the web

More popular!

I've been beating myself up that students were abused and I failed to see it, I failed to help them.
If you have to ask, I failed.
I failed to resolve the situation.
I failed to mention that you qualify for our platinum card.
Why ask a failed romance to come and watch your successful one?
However, Greg not only failed to ask permission, he flaunted his violation on Twitter.
I failed to predict your descent into addiction.
I failed to take into account the cerebral immune response.