Looking on the internet deeply has found these results:

all of a sudden is the most popular phrase on the web.

all of the sudden 127,900,000 results on the web	all of a sudden 157,700,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
And then he finally did, and all of the sudden, we felt like a couple, and couples tell each other things. I know I'm supposed to be this big, bad vampire, but all of the sudden, I'm not so hung up on "revenge." Or it getting really bright all of the sudden. And all of the sudden, I could reach the pots hanging above the range that I couldn't reach before. And the site visibly appears brown, but when we use the infrared and we process it, all of the sudden, using false color, the site appears as bright pink. And then all of the sudden, I saw these fingers coming through the wire. And all of the sudden, I have one of those... those moments where everything sort of comes together. What happened all of the sudden?	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

all of the sudden

127,900,000 results on the web

all of a sudden

157,700,000 results on the web

More popular!

And then he finally did, and all of the sudden, we felt like a couple, and couples tell each other things.
I know I'm supposed to be this big, bad vampire, but all of the sudden, I'm not so hung up on "revenge."
Or it getting really bright all of the sudden.
And all of the sudden, I could reach the pots hanging above the range that I couldn't reach before.
And the site visibly appears brown, but when we use the infrared and we process it, all of the sudden, using false color, the site appears as bright pink.
And then all of the sudden, I saw these fingers coming through the wire.
And all of the sudden, I have one of those... those moments where everything sort of comes together.
What happened all of the sudden?

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