Looking on the internet deeply has found these results:

I visited him today. is the most popular phrase on the web.

i had visited him today. 10 results on the web	I visited him today. 1212 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.	Oct 28, 2015 ... Thank you, i visited him today at the hospital. My grandmother told me that he would stop one of his chemo treatments, while he goes through�... Aug 29, 2015 ... I visited him today and was tormented by the sight of him. He was always an excellent student and deserved to be working along with me or�... ... told me he had been diagnosed with prostate cancer. This week he had a radical prostatectomy; I visited him today and had some thoughts I wanted to share. I visited him today for the first time and was really impress with his professionalism. He did not treat me for allergy only, but underlook for hidden factors that may�...

i had visited him today.

10 results on the web

I visited him today.

1212 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.

Oct 28, 2015 ... Thank you, i visited him today at the hospital. My grandmother told me that he would stop one of his chemo treatments, while he goes through�...
Aug 29, 2015 ... I visited him today and was tormented by the sight of him. He was always an excellent student and deserved to be working along with me or�...
... told me he had been diagnosed with prostate cancer. This week he had a radical prostatectomy; I visited him today and had some thoughts I wanted to share.
I visited him today for the first time and was really impress with his professionalism. He did not treat me for allergy only, but underlook for hidden factors that may�...