Looking on the internet deeply has found these results:

while we're on the subject is the most popular phrase on the web.

while we're about the subjectr 10 results on the web	while we're on the subject 178,800 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.	While we're on the subject. I'm Katie. I'm a journalist, but enough about that. Facebook · Google+ · Twitter · Instagram · LinkedIn · About me · Resume · Portfolio ... “And while we're on the subject of ducks, which we plainly are, the story, 'The Ugly Duckling' ought be banned as the central character wasn't a duckling or he ... Oct 6, 2010 ... While we're on the subject. Could we change the subject now? I was knocking on your ear's door but you were always out. Looking towards the ... Aug 8, 2015 ... J.K. Rowling retweeted GodShuffledMyFeet. While we're on the subject of dropping letters, would it hurt to say the 'h' in herbs?

while we're about the subjectr

10 results on the web

while we're on the subject

178,800 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.

While we're on the subject. I'm Katie. I'm a journalist, but enough about that. Facebook · Google+ · Twitter · Instagram · LinkedIn · About me · Resume · Portfolio ...
“And while we're on the subject of ducks, which we plainly are, the story, 'The Ugly Duckling' ought be banned as the central character wasn't a duckling or he ...
Oct 6, 2010 ... While we're on the subject. Could we change the subject now? I was knocking on your ear's door but you were always out. Looking towards the ...
Aug 8, 2015 ... J.K. Rowling retweeted GodShuffledMyFeet. While we're on the subject of dropping letters, would it hurt to say the 'h' in herbs?