Looking on the internet deeply has found these results:

I'll be more than happy to visit is the most popular phrase on the web.

I'd be more than happy to visit 1238,000 results on the web	I'll be more than happy to visit 15,960,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Which I'll be more than happy to take a, approximately five minutes, which is when I start my shift. When you find your wallet, I'll be more than happy to assist you. And we would be more than happy to advance funds. And I'll be more than happy to fill your shoes. Let me know if you get tired of your boyfriend stomping on your pretty little feet all night. I'll be more than happy to cut in. I'll be more than happy to tell everybody what a hospitable mayor we got. I'll be more than happy to phone them. I'll be more than happy to, ma'am.

I'd be more than happy to visit

1238,000 results on the web

I'll be more than happy to visit

15,960,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Which I'll be more than happy to take a, approximately five minutes, which is when I start my shift.
When you find your wallet, I'll be more than happy to assist you.
And we would be more than happy to advance funds.
And I'll be more than happy to fill your shoes.
Let me know if you get tired of your boyfriend stomping on your pretty little feet all night. I'll be more than happy to cut in.
I'll be more than happy to tell everybody what a hospitable mayor we got.
I'll be more than happy to phone them.
I'll be more than happy to, ma'am.