There are two instances of the woman being nourished for 3-1/2 years:
Then the woman fled into the wilderness where she had a place prepared by God, so that
there she would be nourished for one thousand two hundred and sixty days.
But the two wings of the great eagle were given to the woman, so that she could fly
into the wilderness to her place, where she was nourished for a time and times and half a time, from the presence
of the serpent. And the serpent poured water like a river out of his mouth after the woman, so that he might cause
her to be swept away with the flood. But the earth helped the woman, and the earth opened its mouth and drank up
the river which the dragon poured out of his mouth. (Rev 12:14-16).
This restatement is a Hebrew literary style in which the essential elements of an account are
repeated with some variation and introduces more specific information to emphasize or focus on the relevant
elements of the account. God used this same approach when He informed Moses about Creation especially the creation
of man (Gen 1:1-31; 2:4-25).