Looking on the internet deeply has found these results:

side note is the most popular phrase on the web.

sidenote 12,860,000 results on the web	side note 121,300,000 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.	Just as a side note, your people got some work on their hands looking into that, if you ask me. On a side note, you look amazing. The fact that my mother lost her life for this, for me, is probably just a side note. Just on a side note, I had an idea today. By the way, side note, love the outfit. On a side note, Saunders guided me to a very kind broker who happily deposited our money in Baylor Zimm. First, an interesting side note. And on a side note, the bad boy look really works for you.

sidenote

12,860,000 results on the web

side note

121,300,000 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.

Just as a side note, your people got some work on their hands looking into that, if you ask me.
On a side note, you look amazing.
The fact that my mother lost her life for this, for me, is probably just a side note.
Just on a side note, I had an idea today.
By the way, side note, love the outfit.
On a side note, Saunders guided me to a very kind broker who happily deposited our money in Baylor Zimm.
First, an interesting side note.
And on a side note, the bad boy look really works for you.