If there are so many hits saying it isn't an expression, that is pretty solid evidence that it IS an expression. I don't think I would use 'twice faster', but I'd have to see how it was used in a given text.
Ben is twice faster than Jen.
Chronic alcoholics may eliminate alcohol twice faster than moderate drinkers.
Twice as fast is correct.
Twice faster is wrong.
And never write "two times." That's what the word "twice" is for. (Unless you're in math class.)
What? Why not?
Because, well, that's what the word twice is for. And it sounds childish. Like I can picture someone (generally a three-year-old) holding up two fingers to illustrate.
"He ran around the track two times! Yesterday night."
The point is that 'two times' makes you sound childish
The point is that 'two times' makes you sound childish
I understand the point, however I see no evidence for it, because no evidence has been offered for it. Repetition of the claim does not make it true.
I understand the point, however I see no evidence for it, because no evidence has been offered for it. Repetition of the claim does not make it true.
I disagree, with the meaning "multiplied by two" (c.f. your example which means "twice") it is a perfectly normal expression.
I see nothing childish about 'two times'. People might say 'two times' or might say 'twice', neither one is going to raise eyebrows.
I have a question for you. Why would you want to use two times when there's a more succinct single word for it and using the term sounds childish to many readers?
In my opinion, it's equivalent to saying, "She was more brave than her brother" instead of "She was braver than her brother." Why use two words to say what can be said (more correctly and succinctly) in one? Again, it sounds "off" and childish to my ear.
And you have offered no evidence against it. So there you go.