I have been to America three times.
Vs
I have been to America for three times.
Is for necessary here?
Or is the use of preposition futile here?
I have been to America three times.
Vs
I have been to America for three times.
Is for necessary here?
Or is the use of preposition futile here?
You can go to America for three days, three weeks, three months, but you can't go for three times.
I have been to America three times.
Last time, I stayed for three weeks.
In your example
for
is not used. "for" is used to express duration of time, not number of times.
I have been in America for two years.
For the past three times I've been to America, it has rained.
During the past three times I've been to America, it has rained.