Looking on the internet deeply has found these results:

deadliest is the most popular phrase on the web.

most deadly 1507,000 results on the web	deadliest 119,300,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Lung cancer is the most deadly. What would become the most deadly of them all was situated here, 60 miles north east of Warsaw. Instead, they created one of the most deadly viruses humankind has ever seen. I never forgot when he said that it was the most deadly creature on earth. You were wise to seek help from the world's most deadly weapon. We're about to look at the most deadly virus we've ever seen. But, if used incorrectly, it can be his most deadly foe. I have laid my hands upon his most deadly servants...	I made mine being the deadliest. In law enforcement, we call cotton candy "the deadliest snack". Only the deadliest fighter in all of women's boxing. It's one of the deadliest poisons on the planet. The deadliest weapon on the planet is the human brain. Russia has become one of the deadliest countries for journalists, and her cruel death... You are looking at the deadliest ground troop... to ever walk the planet. In fact, it is the deadliest substance known to man.

most deadly

1507,000 results on the web

deadliest

119,300,000 results on the web

More popular!

Lung cancer is the most deadly.
What would become the most deadly of them all was situated here, 60 miles north east of Warsaw.
Instead, they created one of the most deadly viruses humankind has ever seen.
I never forgot when he said that it was the most deadly creature on earth.
You were wise to seek help from the world's most deadly weapon.
We're about to look at the most deadly virus we've ever seen.
But, if used incorrectly, it can be his most deadly foe.
I have laid my hands upon his most deadly servants...

I made mine being the deadliest.
In law enforcement, we call cotton candy "the deadliest snack".
Only the deadliest fighter in all of women's boxing.
It's one of the deadliest poisons on the planet.
The deadliest weapon on the planet is the human brain.
Russia has become one of the deadliest countries for journalists, and her cruel death...
You are looking at the deadliest ground troop... to ever walk the planet.
In fact, it is the deadliest substance known to man.